If tempered it should be OK, I have a glass on my air cooled, but they say that you loos a little lumen output because the glass reflects some light back into the hood, but I aint complaining, it is better than roasting my girls. This is why some folks use cool tubes.
Adieu
BlueBear Reviewed by BlueBear on . Glass between light and plants Is a piece of glass between my hps lamp and my plants better or worse for light production? Rating: 5