Using cfls

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Mr.Buds

Well-Known Member
I have 2 plants growing in their first set of leaves of 5 and I'm running them under a cfl light (150 watts) coming down from above and a 50 watt cfl giving them light coming in from the right hand side. So my question is if I but the 150 watt cfl light about 6 inches away from the top of my plants will the heat burn the leaves, and if so does cfl lights give off more heat than hps, correct me if I"m wrong but the way I see it, since I've never worked with hps lights, hps give off more light spectrum and lumens but not as much heat as cfls lights? so if you have any suggestions, let me know :)
 
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brian22

Active Member
no it should not burn your leafs 6inches is fine and cfls barley give off heat at all. just have good air flow, fan blowing. and hps lights give off more of everything including heat. hope i helped you.

by the way i have the 42W cfls and i have them 2iches away and they dont burn it at alll.. but im sure the 150W would give more heat off so 6inches shood be safe
 
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Mr.Buds

Well-Known Member
ya at first when my other two start slouching I thought it was because I was giving it to much heat from that light but from reading on other subjects I see now that it could of been a numerous of things. This is my first attempt at soil so everything is up in the air kinda. But thanks for the advice. Do you happen to know what water temperature the water is suppose to be at and how much I'm suppose to be watering them?
 
SilverRabbit

SilverRabbit

New Member
70-76 no higher than 80 degrees, usually water them 1 to 2 times a week but always check your soil first to make sure they need water.
 
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Mr.Buds

Well-Known Member
cool, check out my other thread about the water, if you can please give me any suggestions on that, that'd be suhweet
 
Koabear

Koabear

Well-Known Member
I hve (3) 85 watt bulb over mine 2 red and 1 blue in the middle 5 in n very little heat. i have a fan blowing the tops though
 
bongspit

bongspit

New Member
a 150 watt cfl would put out the same heat as 150 watt hps...or any other type for that matter...150 watts is 150 watts...
 
It's 5 o'clock somewhere

It's 5 o'clock somewhere

Well-Known Member
Actually, not true. It's the way the light makes the light that produces the heat. The 150w cfl isn't actually working on 150w. It just gives out the same lumes per square inch as a 150w bulb. The Hps needs a ballast that is powerful enough to cause the bulb to arch across the gas in the bulb. The cfl doesn't need as much electricity and it's starter is located in the base of the bulb. Cfl's run cool enough to have within inches of your plants but they also lack the strength of the HPS to push it's usable light energy deep into the plant. But with the ability to get so close to the plant it allows you to use them in places that you can't put an HPS light like under the plants shining up into the lower parts of the plant.
 

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bongspit

bongspit

New Member
It's 5 o'clock somewhere said:
Actually, not true. It's the way the light makes the light that produces the heat. The 150w cfl isn't actually working on 150w. It just gives out the same lumes per square inch as a 150w bulb. The Hps needs a ballast that is powerful enough to cause the bulb to arch across the gas in the bulb. The cfl doesn't need as much electricity and it's starter is located in the base of the bulb. Cfl's run cool enough to have within inches of your plants but they also lack the strength of the HPS to push it's usable light energy deep into the plant. But with the ability to get so close to the plant it allows you to use them in places that you can't put an HPS light like under the plants shining up into the lower parts of the plant.
Click to expand...
but...........if it was an actual 150w cfl it would give off the same heat as 150w of anything else....
 
It's 5 o'clock somewhere

It's 5 o'clock somewhere

Well-Known Member
I don't want to argue with you so you can read this report. It's a side by side of HPS and CFL's. It talks about how the light from the HPS is stronger and that the CFL's run way cooler... Not that I need to be reassured but some people have an uneducated opinion and I hope to spread the knowledge around... http://www.maxgrow.de/weedworld.pdf
 
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Mr.Buds

Well-Known Member
It's 5 o'clock somewhere said:
Actually, not true. It's the way the light makes the light that produces the heat. The 150w cfl isn't actually working on 150w. It just gives out the same lumes per square inch as a 150w bulb. The Hps needs a ballast that is powerful enough to cause the bulb to arch across the gas in the bulb. The cfl doesn't need as much electricity and it's starter is located in the base of the bulb. Cfl's run cool enough to have within inches of your plants but they also lack the strength of the HPS to push it's usable light energy deep into the plant. But with the ability to get so close to the plant it allows you to use them in places that you can't put an HPS light like under the plants shining up into the lower parts of the plant.
Click to expand...


when I put the cfl 150 a couple lets say about 5 inches from, it looks as if it heat damages the leaves though, they start to look a bit sad? is that normal, will they recover and come back stronger after they get their sleep?
 
ceerock

ceerock

Well-Known Member
im using cfls and i only get burns when they get really close ..like 2 "...23w cfls 1750 lumen
 
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