Does cooling your light actually decrease light output? - Growroom Lighting - International Cannagraphic Magazine Forums

inc0gnit0 · 04-19-2006, 10:05 AM

I read somewhere on here that when you cool down your light bulb, HID, CFL etc, with the aid of a cool tube or a fan, that it actually decreases the available light output. Some figure in the 20 percentile. The lights put out that heat for a reason and to cool it otherwise could also kill your lumens. Anyone else ever wonder about this? How could this be?

AIR vs LIGHT...

treble · 04-19-2006, 10:28 AM

interesting question and I know not the answer... will look forward to one of the more experienced round here put a few bob's worth in.....

bob's are 20 cents in ye old-ee speak round my way......

Jnugg · 04-19-2006, 10:38 AM

Cooltubes and the glass shields for normal A/C hoods do decrease light/lumen output by about 5 or 10%.

As far as a fan simply pulling cool air over a bulb that is not in a cool tube or in a A/C hood with shield I don't think you would lose any light.

04-19-2006, 10:47 AM

yeah.. the lens will decrease it by a small ammount.. but.. heat = lumens is bullshit.

a MUCH cooler light with a slight lumen loss is no real loss, because you can put the light so much closer

Jnugg · 04-19-2006, 11:30 PM

Quote:

Originally Posted by cannable

yeah.. the lens will decrease it by a small ammount.. but.. heat = lumens is bullshit.

a MUCH cooler light with a slight lumen loss is no real loss, because you can put the light so much closer

Yup it's all about the inverse square lumen law.

xxoshz25xx · 04-20-2006, 12:10 AM

Im confused about all of it..... but i can grow pretty good if I do say so....

04-19-2006, 10:05 AM	#1
inc0gnit0 Member Join Date: Dec 2005 Posts: 131	Does cooling your light actually decrease light output? I read somewhere on here that when you cool down your light bulb, HID, CFL etc, with the aid of a cool tube or a fan, that it actually decreases the available light output. Some figure in the 20 percentile. The lights put out that heat for a reason and to cool it otherwise could also kill your lumens. Anyone else ever wonder about this? How could this be? AIR vs LIGHT...
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04-19-2006, 10:28 AM	#2
treble Member Join Date: Feb 2006 Posts: 566	interesting question and I know not the answer... will look forward to one of the more experienced round here put a few bob's worth in..... bob's are 20 cents in ye old-ee speak round my way...... __________________ my questions are all hypothetical and should be viewed in a past tense. AK48, White Rhino grow with some Boggle to come <- pics getting better as we go Hi ho Hi ho..... its bogglegum we'll grow <- the bogglegums on the grow infowars.com Because there's a war on for your mind
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04-19-2006, 10:38 AM	#3
Jnugg Senior Member Join Date: Feb 2006 Location: S.E. USA Posts: 1,720	Cooltubes and the glass shields for normal A/C hoods do decrease light/lumen output by about 5 or 10%. As far as a fan simply pulling cool air over a bulb that is not in a cool tube or in a A/C hood with shield I don't think you would lose any light. __________________ Jnugg Converts & Goes Vertical Organic Tea Party w/ The Rev. Ventilation 101
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04-20-2006, 12:10 AM	#6
xxoshz25xx Member Join Date: Feb 2006 Location: NorthEast Posts: 394	Im confused about all of it..... but i can grow pretty good if I do say so.... __________________ XxOshz25xX It's all in the genetics!!!!!!!! ~Oshz, the official bong toker...lol~ Great roots mean great buds....
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04-19-2006, 10:47 AM	#4
Guest Guest Posts: n/a	yeah.. the lens will decrease it by a small ammount.. but.. heat = lumens is bullshit. a MUCH cooler light with a slight lumen loss is no real loss, because you can put the light so much closer
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