Compact fluorescent (CFL) grow lights

In the old days growing marijuana under fluorescent (CFL) grow lights was pretty useless as they had low output for a large size. However, the new CFL (compact fluorescent lights) grow lights that between them cover the full visible light spectrum have made them a viable alternative.

Jump to the bottom of this article to see how CFLs are losing to LED grow lights. 

CFL compact fluorescent grow lights are becoming increasingly common among small-scale, closet and tent marijuana growers for use in their grow rooms. They are energy efficient and produce very little heat so you can place them as close to your plants as a few inches away. This means you can grow your plants easily in a small space.

Efficiency at the high end ranges from 75 to 98 lumens per Watt consumed. Bulbs in the 2700k to 3000k (Kelvin) range provide higher yellow / red spectrum which promotes flowering. CFL grow lights in the 5,000k to 6500k range spectrum offer lots of blue light which promotes plant growth.

 

 

As CFL grow lights don’t pose any heat extraction issues ventilating your grow room on account of heat from sodium lamps and high intensity discharge lights can be very costly which makes them very popular for small marijuana grows. (Note that for commercial spaces, HID lights are more suited as they penetrate the plants further to produce tighter buds at a faster pace.)

If you are interesting in growing your own marijuana with compact florescent lighting, there are some things you should know.

 

 

Above is a picture of a CFL 300 Watt which is self ballasted, cool running grow light and you can get it in a choice of light spectrums with high lumen output. Often CFL grow lights cover one part of the growing range, either vegging or flowering and often do not cover the entire light spectrum required for high yield marijuana growing.

One product on the market is Eco-Lights which claim to be a ‘high powered compact fluorescent grow lamps (CFL)’ and usually are very good as a supplementary light to your main grow light. Like many fluorescent grow lights they are available in both the blue and red spectrums for vegetative and flowering growth respectively. These are not as high intensity lights as HPS but are cheaper to buy and cheaper to run. They do not require a separate ballast as they simply screw into a standard E40 fitting (normal grow light lamp holder) and run directly through a mains plug. We here at HowtoGrowMarijuana.com however like the full spectrum LED grow lights. They run for longer, take up less space and deliver a lot more intense light equivalent to a HPS but about half the electricity and like the CFL’s do not require a ballast.

 

How to choose a CFL grow light

CFLs are cheaper than HID lights and they’re mobile and flexible. Your objective when buying CFLs should be to purchase the Wattage that is the highest possible for your grow area which usually gives you the largest amount of usable light. You may even use combinations of several bulbs depending on your grow space.

First know what’s available. The smallest powered CFLS come in 15 and 26 Watts which are really of no use for growing weed. Then there are bulbs of 42, 65, 68 and 85 Watts of which you can use several without significant heat output. High Watt outputs are available at 125, 250 and 300 Watts.

 

 

The 125 Watt lights above with Euro reflector, 480mm length, 400mm width and 120mm depth. It comes in both red 2,700k and also blue 6,400k and both put out approximately 5000 lumens.

 

 

This CFL grow light offers around 12,500 lumens, more than twice the 125W and is ideal for propagation or supplementary lighting. Again you have to buy either the blue for vegging at 6,400k or the 2,700k for flowering.

Spiral type CFLs are better suited to emitting light in a sphere than tube type CFLs, so they are usually preferred and compact florescent lighting will offer around 10,000 hours before requiring a change.

If you’re wondering what brands to buy, you can check out the T5 and T8 CFL tube systems that offer the full light range of the visible spectrum. Eco-lights is a brand that offers ‘high powered’ fluorescent compact CFL grow lamps that are good supplements to main grow lamps. They are available in blue and red spectrums. You don’t need a ballast to run them – they’re screwed to a socket and run by the mains.

 

 

The light in the image above is a Senua 200w CFL Hydroponics Grow Light, with alternative RED 2700K & BLUE 6400K filaments. This is ideal for propagation, side lighting and mother plants. It is used with an E40 hanger or CFL reflector- so you can just plug in and grow. Blue light for growth and red light for flowering.


Efficiency of CFLs

Your aim with the CFLs will be to provide the maximum ‘amount’ of light to your plants while not compromising on power drawn. A 42 watt CFL provides about 2700 lumens or 64 lumens for every Watt. Therefore four such bulbs will draw 168 Watts and provide a total of 10,800 lumens to your plants.

Which is the most efficient bulb in terms of light/watt ratio? The 150 W CFL is rated 7,500 lumens, so l/w ratio is 7500/150 = 50. The 200 W is least efficient emitting 9,250 lumens, with an l/w ratio of 46.25. The highest ratio (and therefore the most efficient) may be the 26 W bulbs each of which emits 1,700 lumens with an l/w ratio of 65.38.

How much light you need to provide your plants will depend on various issues such as your growing area and how big you want the plant to grow etc. We’ve taken a look at that in a section below.

 

Considering color temperatures of CFLs

For CFLs it is not enough to consider power alone. Color temperature is important (which is not the visible color of the bulb). For growing marijuana, you will need bulbs that release blue UV light in the growing phase and red-yellow UV light in the blooming phase. The purpose of this is to emulate sunlight as much as possible. In the spring, sunlight is largely composed of UV rays in the blue end of the spectrum and in summer, those towards the red end. These are the lights that the plants absorb and use the most, not the yellow, green and orange lights that the sun (and CFLs) also emits.

You’ll find CFLs also labelled in Kelvin which is a measure of color temperature. Bulbs are available with ratings of 2700k, 3000k, 4100k, 5100k and 6500k. The lower rated ones (warm white) are for flowering or blooming stages and the higher rated ones for growing stages (cool white).

Ideally, you should aim for a balanced spectrum with a combination of low rated, high rated and mid range (4100 Kelvin) bulbs for the best growth.

 

Light distribution across the grow area and height of lights

Now that you know about types of bulbs, you will have to decide how many to buy. Note that hanging your lights securely with chains is a good way to give yourself the flexibility to raise and lower them to suit the height of your growing plants. You can safely place your 42, 65 and 85 W CFLs about an inch and a half near your plants without burning them. For 125 W and 250 W lamps, the plants should be about 3 inches away. That should give you an idea of the height of the lights.

The size of your growing area and how big you want your plants to grow will determine how much light you need.

Small plants require about 3000 lumens per square foot, which is the minimum amount of light you will need. But since a lot of light is lost with distance and reflectivity, it is safer to aim for higher light. Ideally, try to achieve about 7000 to 10,000 lumens per square foot for medium plants. Compare with the sun, which emits 10,000 lumens per square foot on a sunny day in peak summer. That is the luminous flux you should try to achieve.

 

Using a reflector

In order to make the maximum use of the light from your grow lamps and reduce wastage you will need to use a reflector with your grow lamps. Reflectors will direct light towards the plants. They will reduce light escaping upwards and out towards dark walls. They will focus the light on your plants. Many grow lights come with their own reflectors. Otherwise they are readily available at lighting stores such as Walmart (whose reflectors are cheap but not fragile), Home Depot or Lowes (who offer heavy duty reflectors for a few more dollars).

Also cover the walls of your greenhouse with inexpensive Mylar sheeting so light can be reflected back into the room from dark walls. This is an essential step. Mylar sheeting can efficiently reflect back as much as 95 to 98 percent of the light that falls on it. Alternatively, you can paint your walls a white matte color. Never use silver foil, which can create hot spots that end up absorbing light.

 

A Grower’s tip

Many home growers who don’t have to think about budget suggest that in the last week or two of budding, it can help to install a metal halide (MH) lamp which produces the richest buds with more smoke. It doesn’t affect the yield but the quality of the plant.

 

CFL Vs LED grow lights

The compact fluorescent lights are a fantastic way to grow in small stealth locations where heat emissions are very important to control and also they are cheap to buy and run but they are generally limited on power. If you want some more power but still maintain a small heat signature, albeit more than CFL you might want to start looking into LEDs – especially the full spectrum LEDs. We have a good article here that outlines what you might expect from LEDs there days. More on LED grow lights.

SpectrumKing with SGL

The Tipping Point between CFL and LED has come and gone

Energy-efficient lighting industry professionals have seen a dramatic decrease in the use of CFL lighting in industrial applications with LEDs taking over in 2014. In 2013 26% of respondents to a survey of 5000 professionals stated they would use LEDs and 68% percent said CFL, those figures for 2014 are now 49% LEDs and 46% CFLs so you can see a huge movement to LEDs. The same shift is occurring in the grow light arena with people moving away from CFL in smaller grow spaces to the LEDs. These days they are better bet. More on that article.

CFL-lighting-vs-LED-lighting

 

*** Marijuana grow lights overview ***

Industry Friends

Full spectrum grow lights – Decades of experience in producing LEDs that give your plants the broad spectrum of light they need.

Medical marijuana blog – The pros and cons of growing medical marijuana, laws, cards and dispensaries.

Hydroponic marijuana – Grow unbelievable buds with the latest hydro gear.

Vaporizer – Premium herbal vaporizers and reviews since 1996.

Hydroponic Closets – By www.FullbloomHydroponics.net

Legalize marijuana – Do you want marijuana to be legalized and for governments around the world to stop wasting billions on policing it and in the process turning usually law abiding people into criminals whilst creating a lucrative black market for the real criminals? Check out the pros and cons of marijuana legalization.

67 responses to “Compact fluorescent (CFL) grow lights

  1. Need help…I have a feliz 2700 k/6500 kdual spectrum 250watt my grow space is about 3×3 2 plants,but what I need help on is tring to find how low to put the light.I have good soil.No bugs,or any other problems except How low does it need to be what are we talking here.Please someone out thier help me get this going.I grew outside with no problems,but cant seem to get my weedlings to grow.This makes me very sad…….HELP ME PLEASE………………..

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    • OK I will try for you all using CFL’s 125+
      For Clones in perp tank under 125+ CFLs best to have the light about 3ft away. The temp will be about 21degree depends on the space also leave the lid on only open and spray if moister has gone.
      I only get fresh air 1s aweek by then roots are already out.

      Using 125+ CFL Bulb on Mother Plants.
      Do not Flood Plant with water
      Keep the mother as close as u can and CFL bulbs will burn plant leaves if it touches the bulb but u can have it 3-5cm away from the top of the mother plant.

      I have used a 125 CFL with 2 mothers and a Tray full of fresh new clones all Clones took and mother still growing.
      Bigger wattage CFL bulb more u keep it away from leaves to stop burning.

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  2. david, you gotta use the blue and red spectrume lighting. 2500k-(red spectrum aka: soft white) 6500k-(blue spectrum aka:daylight. Red spectrum is for flowering and the blue is for the vegitative stage. You can use them together for the flowering stage.

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  3. You can go to lowes, get the 6500k CFL bulbs with the plant leaf on the package, the higher the wattag the better. each bulb gives off about 1400 to 1600 lumens each. So if you get an adapter so you can put two bulbs in each socket it makes up for low light output. This is a great way to have it in a small space, low heat and space

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  4. the 1000 watt light is to big, you would only need a 400 watt.

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  5. You need more light Rod. 1600 aint gunna do it..you should have at least 4 of those just to start.

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  6. Go to cfl-growlight,com they have some really nice cfl lights there. I have 2 2ooo watt lights from them and i love em. Great results.

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  7. Ive been told vho florescent lights are the best. Any comments? And if they are can somebody post a link because trying to find them is very confusing all the websites ive checked are very unclear.

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  8. Can i some way use a panasol 2 light treatment unit to grow?

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  9. can i use two 40watt cfl bulbs to grow just one plant in my closet?? help

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  10. just wondering guys if i was gonna grow 2 plants in a 32x32x60 grow tent how much and what kind of lights i need? pref do not wanna pay 100 a piece…lol

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  11. i am a new grower and have indoor clones four deep purple to be exact. i have them in a 36×36 br closet. i have them under 6 24 inch 75 watt flourescent lights i purchased from kmart.the plants seem to love it they are thriving,is this enuff for them and the main question is r they good for budding as well or do i need different lights for that. flourescent only please help!!!!!

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    • Hi David. Kind of depends on the color of the light. It should be marked on the bulbs and packaging. If it is around 2700K then you are laughing. If it is too far from this number, then you may struggle a bit.

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  12. hey iam growing and is a lot of heat bad

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    • The hotter your plants get the less they will grow, over about 90 degrees they will not put on as much foliage of flowers, so cool it down if possible.

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  13. can i use two black lights and a floresent will that work

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    • Black light is a waste of time. wrong color light

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    • No mate, this is a waste of time. This is the wrong kind of light. It would maybe help as supplemental lighting, but not as the only type of light.

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  14. Yes those should be sufficient

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  15. Ive got two plants and would it be sufficient enough to grow with 4 four foot flourescents. Two are 40w sunshine bulbs that produce 6500k and then i have 1 40w grow lux and 1 40w cool white?

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    • They will grow but as they mature they will loose lower foliage and the flowers will not get very big and probably not very tight or full. 600 watts at the least to bring out the best in your plants

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  16. I use light It Bright brand CFLs 250 watt lamp their red lamp is 2100k the only one on the market in the USA ,blue lamp is 6400k .the best CFLS on the market!..

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  17. with light distance you’ll feel a warm spot under your cfl keep the top of your plants just a couple inches under that will be sweet as :)
    if the sides of the leafs start to fold up you’ve got heat stress need a little bit more distance . be patient thats enough light just takes a while to grow.
    300waters are easiest to get online 3 105w will do the same job you can flower with them just get either red spectrum or natural day light ones which are good for veg state too

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  18. you need 5000 lumens per square foot minimum for a gd plant for normal photoperiod 24h blue for two months then switch 12/12 red leaving the plant in the dark for a full day first can help speed things up
    cfl’s wont start fires my 250w gets a little toastie but not hot even after 18 hours on
    white widow isn’t a gd beginner strain… oh and flush every three weeks screwed my first few grows that way…. it sucked…. lol hope this helps

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  19. dude check out thcfarmer,com……NO u cant flower at 24/7 maybe auto,s at 18-24 h/a day…but 12/12 trggers your ladys into flowering and dont interupt light cycle, keep light leaks to a min. and flush before harvest!!!!!

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  20. So i started a seed outside in a Lil pot,its been cold and raining so i brought it in and want to keep it inside. I put it under 6 60w cfl blue w/ 900 lumen each. Im such a noob, ive had it inside a few days and have seen no change at all. Im not to sure on the light distance. Can any BUDdy help me out thanks

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  21. can anyone tell me where to get those 300w cfls i think they called t5 i looked everywhere and can i use them for flower

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  22. Yes you can use self ballast cfls in regular household light bulb fixtures. I have 4 65 watt day light 5000k cfls for veg stage=80$ and 4 65 w soft white 2700k for flowering stage=80$ and i made my own reflectors out of those foil things u use for cooking in the oven the biggest ones=8$. cut a hole in the end and insert a bulb fixture=20$ and bam u got a cheap setup just change bulbs between veg and flower been doing this for years with high quality yields. perfect for a new FARMER

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  23. i have 1 42w cfl bulb and 4 32w bulbs and a heat light my plants are only two weeks old is this to much light or not enough and should i have the fan going now.

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  24. can you use a self ballasted cfl in a regilar home light fixture or do you have to spend an arm and a leg for the set up please help me out

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  25. how do you tell red spectrum fluorescent tube from blue

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  26. I have 1 blue dream plant and its going to be 3 months 2morrow and it don’t looks like I may not be able to get a lot of buds I would like some help I have it under 2125w cfls and 1 24w cfl and 1 32w cfls as well and I don’t no if that’s good and I want to know if blue dream is a good choice

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  27. hi. ive got one plant with two 45w blue spectrum anf two 45w red spectrum and also added four 20w 2700k bulbs around the plant. is this good enough for a ok yield? thanks for any reply
    Rich

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  28. roger…get some red spectrum in there…high pressure sodium comes in smaller sizes as low as 70 watt at wallmart hardware places.you have to boost your lumens and red more…assuming u are useing proper nutrients…not the cheap all in ones…or if u have to use an all in one,get for tomato flowering..it will be fine for a newbi

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  29. take yer massive plant and make many clones…go directly into bud cycle one week after cloning….!ta-daaa

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  30. This is my 2end year growing outdoor an now I decided to try and grow some dro. I have two plants about one foot each but I’m not sure if my lighting set up is right I have two 60 watt fluorescent self ballasted per plant. I also try to put them in the widow for a few hours on sunny days only. Will this set up work untill I need to change it up

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  31. Im a new grower who wants to start with WSS Skunk Feminized, I want to do one plant and one light wats the cheapest best light to use and where can I get these locally?

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  32. hi iam rod first time grower using a1600 lumens cflsoft white flourescent my plnnt is budding very slow need to know what i am doing wrong?

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  33. ANYONE THAT NEEDS HELP EMAIL MY EMAIL I WILL GIVE YOU ANY ANSWER YOU NEED ASAP TO BETTER ASSIST EVERYONE I AM THE MASTER GROWER I KNOW IT ALL!! BEEN GROWING FOR 15 YEARS PLUS!!! EMAIL FOR ANSWERS TO YOUR QUESTIONS!!
    matthews316@yahoo.com

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  34. GET TIMERS TOO! YOU CAN FIND ALL THIS AT HOME DEPOT OR LOWES!

    Also if you have any questions feel free to ask i will let you in on a little bit of my growers secrets i learned along the ways. HAPPY GROWING!!

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  35. hey you can have up too three cfls per plant!! it will only help i usually have one stationed on top in the middle and the other two i put on bottum aiming up through the leafs at the bottum of your bucket or if your plant isnt that big yet just angle the two of them on the sides you will see an increase of light. I woulkd use three 100 watt cfls that is what i am using and they are loving it make sure you have a heater and a fan and foill your walls always!! I HOPE THISH HELPS

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  36. If you have a 4 by 4 room that LED ( and I think you are saying it is 300 watts ?) would be good but it is only 1 lamp.
    LED works like this. IF that lamp is a 300 watt , 3 watt chip set light with a red bias ( a flowering lamp ) it will get the center of that tent, about a 3 foot diameter circle, well. That’s about 7 sq. feet. You have 16 square feet.

    So in your case you cannot mix LED / CFL in that entire tent. You will have to go LED in the center and largely CFL in the other areas. I cannot imagine why you would want to use a 1000 hps?????

    Place the LED in the center and get about 10 23 watt 2700 k CFL’s for the rest. Space them at every 1.5 feet around the perimeter at about 1 foot in from the wall.

    Now..don’t get stuck on just jamming lights in there. You have to get all those lumens from those CFL’s. It has been my experience that CFL’s directed with their top toward the plants do not produce as much light as those that have their side aimed at the plant. In fact I have tested this with a host of PAR, LUX meters and all say..use the side of the light.

    SO you can try this. Go to Lowers or HD. Get a couple of value packs of 23 to 27 watt warm white ( 2700 K ) CFL’s. You will need about 10 or 12.

    Go to the aisle that has the repair plug-ins for cords. You will see a bunch of light sockets in that area. Get the cheap black plastic ones. It will look like this:

    http://images.lowes.com/product/converted/032664/032664422805xl.jpg

    Make sure it has that tab on the bottom! Get one per bulb.
    At the end of that aisle are the extension cords. They have some cheap white ones for less than 2 bucks. They are 6 feet long. Get one per bulb.

    Next you go get a length of 4″ WHITE PVC drain pipe. It looks like this..
    http://images.lowes.com/product/converted/611942/611942109067xl.jpg

    about 9 bucks. IF you don’t have a truck have it cut into 2 5 foot lengths.

    Now get about 5 lengths of 1/2 in PVC pipe.

    What you are going to do: You will cut the 4 inch pipe into 8 inch lengths and then split them into 2 half’s lengthwise. That will serve as a reflector body. You will cut the female plug end off the extension cords, strip the wires back ½ inch and mount them to the wire fittings on the sockets. Then bend the mounting tab on the socket so you can mount it in the reflector. Drill the cut PVC reflector near the bottom center so that you can put a screw thru the tab and into the PVC. You should end up with a socket..slightly tipped outward that allows you to screw in the CFL and have it nestled inside the concave of that white PVC pipe. Its entire length should be within the PVC.
    You are going to hang these things along the perimeter of your tent. Each facing the center. So, you will need at least 2 power strips mounted to the top poles of the tent so you can plug in all those lights. YOU can use expanders because those lights pull very little power.
    The tent / plant combination dictates how far from the walls the lights will be placed. You will need to rig up some sort of hanger apparatus, bar or rope, to hang the lights from. You can but 4 lengths of ½ CPVC (the tan stuff) while you are shopping and you will have this nailed.
    Now cut the ½ PVC into the lengths you will need to hang you lights at the height you desire. I usually drill a 1/8 inch hole through the top if the PVC at about a ¼ down. I fabricate a hanger hook with coat hanger wire and run it through these holes.
    Drill a hole thorough the other end of the PVC as well as one in the center back of your reflectors ( it is a good idea to do this prior to mounting the light fixture ). Screw the PVC to the back of the reflector. You now have a ridged drop down light reflector. YOU CANNOT use rope or wire to drop these things down as they will twist all over the place. Hang the reflectors around the perimeter of the tent. Plug them into to the power strips. Add the bulbs. You will have a very intensely lit tent.
    You can email me at ralphcurtis at hotmail . com and I can send you some images of this kind of thing. I make them with an adjustable length and light end that allows me to put light wherever I want. I use LED in the center and CFL on the periphery.

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  37. Looking for help with the light set up for my flowering room. I have a 4X4x78 tent. was going for a 300 led light in combination with a 150 hps I already have. Or should I go with the 2700k for flowering. and if so how many would it take to produce the night tight nugs? First time cultivator. So confused! lol Or should I order a 1000 hps?

    Vegetative tent(3×3) has 2 200 watt clf’s with reflector. Am happy with my choice there. suggestions please!

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  38. get a large clamp reflecter an us a 200watt 7500k cfl bulp 18/6 for veging and a 2700k for flowering. Put the light 6to 8 inches from top of plant.

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  39. What stores can i get these at?

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  40. i have a cfl 300 and i will start 5 plants chunk is it ok? is it proplem if i put also a 200w or 400 w hps lamp

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  41. what is the best light to use for a first time grower with one plant and where is the best place to set it up at??

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  42. I’M running four 200watt 6500k cfls and four 100watt 2700k soft white,I use mylar film for reflection.Ihave four white widow autos at 6 weeks that are forming nice buds so far,plus 3 sensi kush and 3 early misty,and all are doing well.light are on 18/6.

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  43. I have fiddled with CFL’s. They are quite good for small plants, fostering etc. The HID’s here in the UK are a no no. :( CFL or LED seems the way to go. The above picture looks like four 20w CFL’s..

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  44. just use regular 60watt white red and blue cfls. i got one sativa under 1 daylight 1 red and 1 blue cfl lights from home depot works great just keep em close. big bawlzzzz in duh hizzousee!!

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  45. seems led’s are all the rage, i use cfl’s though, cos theyre a lot cheaper than led set ups to buy, and are also a lot cheaper to run than mh or hps, i have found to get good results, give both stages of growth an extra couple of weeks, and it works fine (this is why commercial growers hate cfl’s… it slows the production line down- however for a personal grow with no ‘deadline’ for finishing the grow, i find them ideal, low cost, low electric, low heat…so can go 2″ off the top of the plant, so good for tight spaces and small grows. couildnt ask for more realy

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  46. i use blue/red cfl’s in a tight space… to save electric, i am useing red spectrum. i have 1 plant im flowering, 1 mother, and 1 cutting, i set the light to off during the day, at night, everything goes under the light, by day, mummy and the nipper go on the window ledge, i have noticed that despite being in some sort of light 24/7,(12hours red bulb’ 12 daylight) mummy and baby have also started to flower just as quickly as the biggen (im 8 days into the red bulb on its 12hr cycle now)… noting this, i ask… has anybody ever tried flowering 24/7 on red spectrum cfl’s… does it work- or make them flower quicker… cant seem to find anything online about this.

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  47. Hi guys please help me out!!! I am growing 5 plants and i have them under 6 cfl bulbs. I believe they are 2700k and 1600lm. I had the plants on the balcony with fair sun for 2 weeks and just put them into 12-12 light yesterday under the 6 cfls. Is that going to be enough to finnish a good crop??? Or do i need to add more light? If so please specify what kind of bulbs im missing and how manny. I will appriciate any advice ;)

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  48. i am growing 8 plants from seed and am going from indoor to outdoor is this good. i am also woundering what the cheapest rout to go is as far as lighting? Thanks for any help

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  49. im a new grower i would like to start of with 3 1. whitewidow,2. ligths of jah 3. super sour lemon haze what tpye of ligths will give best resuls ?

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  50. i a new grower i would like to start with white widow, ligths of jah and super sour lemon haze what type of ligthing for best yeild & quality?

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  51. Recently acquired a 42 watts 2700 lumans bulb, however due to its weight it sags.

    Will a modified dog vinyl harness to hold the light in place, if it will burn right through?

    PS this is my first grow, and besides a 10/20 gallon pump I have been able to acquire legally all my basic pieces (minus seeds of course)

    I dont want to start burning or fire (I’d love to find some U(?) brackets metal to hold it up with but no luck so far.

    Please any information about my new light or what I can/cannot use to hold the light in place

    THANKS

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  52. 4 Sunlite 105 watt cfl. get 2 warm white(flowering) and 2 cool white(vegetive) bulbs. they are huge bright work great you can put them real close to the plants and move them around when necessary.

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  53. if your growing a big plant with only one cfl better get the biggest you can find and add some smaller ones around lower down the plant

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  54. 1 massive plant,,,a sativa it must be!
    1 1000w HID is the cure for one massive light hogging sativa.
    I strongly recommend either Arjan’s haze #1 or Arjan’s ultra haze #1!!
    I get as much as 1200+ gr from haze #1 and 1000gr from the ultra.
    Massive sativa high!!!!!GOOEY,STICKY BUDS,,lots of res hash from trim!
    BEWARE as these grow to 10-12+ feet high!!! AND,,,,as with ANY strain, don’t forget to put the MH bulb BACK IN for the last 2 weeks of flowering!!! ( This kicks THC levels through the roof by the increase of UVB rays )

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  55. Whats the best light set up if I’m only growing one massive plant with one light?

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  56. for 2 plants cfl i personally would use 2 105 watt, one 6500 and one 2700 color temp. you can find them on ebay for 50 dollars for both. the 105 watts have 6500 lumens each thats 12000 total and would be good for 6 square feet. (3×2)

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  57. self ballast? does that mean i can use a light fixture for it from a hardware store (120vac 60hz) so i can make my own light reflecting fixture with heavy duty aluminum foil?

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  58. what kind of lights do i need to grow 2 plants man

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  59. Real brain power on dspilay. Thanks for that answer!

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  60. Hey Berrystraw. We have had this question recently on the forum. Check out the thread here. http://forum.howtogrowmarijuana.com/grow-lights-led-cfl/real-watt-cfl.html
    Basically, you should be looking at actual Wattage, not the equivalent. You have a 23 Watt bulb which is not going to be enough to flower your plant.
    Why not join the forum where you will be able to get answers to any more questions you have…

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  61. thanks for answering me
    I bought two huge 64 watts and now I am going to read the forum
    I was making a big mistake

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