I notice while looking at the SBMVB bulb while off that the inside glass tube of it has somehow blackened a bit and have a smoky color to the glass. When it is switched on it gives off light as normal. From my understanding, that a MVB that is not very old (mine is about 4 months) should be giving out UVB properly if it still switches on. But is this blackened smoky tube ok? It's not completely black just the glass on the tube has gotten a bit "smoky".

well since noone has replied to this I would say ask the seller if it came from bob mack and he thinks its bad then im sure he will replace it

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Head bobs from Jorge, Jade, and Myself =)
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Who's bob mack?

did you buy the bulb from reptileuv.com ? if not then nvr mind

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Head bobs from Jorge, Jade, and Myself =)
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No I didn't. It's not a mega ray. But thanks.