Yes I have another fixture I can use, but I just upgraded to MH and bought 2 of these hang on units for my 55 gallon. When I took one of the units out of the box, I had broken glass. Thought it was the bulb, but it was the sheild. I will use my other fixture. The store is fed-ex'ing me a new sheild. Broke yesterday. It is more the fact that when you spend the money on a new toy you want to use it.