Quote:
Originally Posted by Snaz
Again lets look at the 3/8" glass cover on the face of a metal halide light, it blocks up to 80%? of the UV rays does it not? This to me illustrates clearly that glass has great potential to block light.
|
Take a look at Sanjay's lighting pages. Several of the DE bulbs give PPFD numbers with glass, and without glass. There is very little difference. The glass does not block very much of the light.
09-18-2009, 02:37 AM
Threaded Mode
