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The Hollyberry Lady · 12-07-2009, 10:13 PM

If the mercury tube inside the center of the bulb, isn't perfectly white - it's a used bulb. If it's black or grey, it is not new.

For example...

See how the tube in my bulb is only white a quarter of the way up?...

This is a bulb that's been used for 4 months - needs replacing as far as I am concerned. The tube should be solidly white when it's new.

Hope this helps.

: )

12-07-2009, 10:13 PM	#6 (permalink)
The Hollyberry Lady The Hollyberry Lady 's Photo Gallery Find me on the map! Join Date: May 2009 Posts: 15,160 BananaBucks : 452,333 Feedback: 1 / 100% Said "Thanks" 12,041 Times Was Thanked 11,284 Times in 5,303 Posts Said "Welcome to Bananas" 102 Times	Re: Metal Halide bulb question. If the mercury tube inside the center of the bulb, isn't perfectly white - it's a used bulb. If it's black or grey, it is not new. For example... See how the tube in my bulb is only white a quarter of the way up?... This is a bulb that's been used for 4 months - needs replacing as far as I am concerned. The tube should be solidly white when it's new. Hope this helps. : )