Premature halogen bulb failure

captainvideo462002 · 2008-02-08T22:51:36+00:00

These are 40W Wagner 795 halogen bulbs used in an automotive light bar. They failed prematurely. We were very careful installing them that they were never touched by hand. So I have some questions: 1. Why is it that touching halogen bulbs can decrease their life? This is a sealed bulb. 2. Should we clean them with 99% isopropyl before installing them? 3. Does anyone have any ideas as to why these failed prematurely? Thanks, Lenny.

Feb 08, 2008 21 Replies

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James Sweet 18 years ago

Aren't they only rated a few tens to a few hundred hours too?

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Ron(UK) 18 years ago

Absolutely not, I have lamps which have been in regular service for over

10 years. HPL575 in source Four fittings, never changed since commissioned. The long life version of the lamp is rated between 1500 and 2000 hours.

On the other hand, the lamps which do fail regularly tend to be in the same few lanterns. This I put down to poor connection betwixt the lamp pins and the sockets.

Ron(UK)

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