What is the "risk" of running the ATI LED Powermodule without the acrylic shield? I know the instructions state NEVER operate without the shield, but the way my tank sits at a diagonal in a corner, the shield will not slide out because it is obstructed by a wall. I would rather not have to take the fixture down from the ceiling every time I want to change bulbs. The unit is already out of warranty, so not worried about that. Will it harm the unit, inhibit optimum results, or is it a safety issue?