how much UVB does plexi glass filter out? Cuz I bought a t8 strip light 5.0 UVB to shine into the aquarium since puck the turtle doesn't bask too often but I'm worried if I remove the plexi glass then evaporation will harm the light fixture. Puck usually hangs out 2 inches right under the current light fixture under the basking platform. Will evap hurt the light fixture or can UVB penetrate the plexiglass enough to make a difference?