metal halide emmission?

[MikeP]

So this is a mogul base bulb? In any case if there is anything broken about it do not use it at all. You can harm yourself and the tank. The glass on a mogul bulb is a UV shield, if it's a double ended bulb the glass underneath is the UV shield. At least that's my understanding, someone can correct me if I'm wrong. You had better play it safe in the mean time though.