Hey guys,
I have done much research for my aquarium, it is a fact that glass does indeed absorb a small amount of your light. It is said that acrylic actually allows much more light to pass through (near 100%). Acrylic does scratch easier and if exposed to too much heat will begin to break-down(burn).
But if you could keep the acrylic cool and clean it would be the best choice. :thumbsup: