The other day I looked up whether I would get any benefit from the suns UV rays if I stood in front of my window and the answer was that UV rays don't penetrate glass. If this is true then how are all of those reptiles getting any benefit from those UV ray lights if the rays can't benefit the glass of the bulb? Kinda makes ya wonder. Kinda makes one feel cheated to have spent money on something that doesn't work as claimed. Any thoughts?

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