Discharge lamp having a visual-change timer

Details Discharge lamp having a visual-change timer Discharge lamp having a visual-change timer

2011-05-31

2011-05-31

Patel, Nimeshkumar D (Department: 2879)

Electric lamp and discharge devices: systems

With signal, indicator, or alarm

Radiant energy responsive control type

C313S634000, C374S162000

Reexamination Certificate

active

07952291

ABSTRACT:
A discharge lamp having a visual-change timer is described. The visual-change timer is comprised of a ceramic material that provides an indication of the cumulative operating time of the lamp. The visual-change timer is expected be a help to consumers in avoiding unnecessary, premature, and costly lamp replacement and a help to lamp manufacturers in verifying the validity of warranty claims for replacement lamps.

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