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Sylvania 175W Mercury Vapour
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Here's a well used clear 175W Sylvania mercury vapour lamp that no longer works.
Manufacture date: Date code: SR 072
Colour temp: 5900K
Lumens: 7150
CRI: 22
Base: Mogul E39 Brass
Lamp shape: BT28
Made in: USA
Lamp life: 24000+ hours
Ballast: H39
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The special coating is those like the Lifeguard, Bonusline and Banner......
what's the stuff made of?
and i agree with don...eventually it would get used up and start blackening.
But that is very black! How long has this been in use?
You could try this on the 320W PSMH ballast from the M-400A2 I'm sending you Darren.