Does cooling your light actually decrease light output?

[inc0gnit0]

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]

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]

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.

 

[Guest]

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]

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]

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