SRC Forum - Message Replies


Forum: Reliability & Maintainability Questions and Answers

Topic: Reliability & Maintainability Questions and Answers

Topic Posted by: Reliability & Maintainability Forum (src_forum@alionscience.com )
Organization: System Reliability Center
Date Posted: Mon Aug 31 12:47:36 US/Eastern 1998

Back to message list Topics List About this forum
Original Message:

Posted by: Jim Jones (jcjones@link.com )
Organization:L3
Date posted: Wed Jun 19 12:40:35 US/Eastern 2002
Subject: MTBF for Halogen Lamps
Message:
We are using a 12V sealed beam Halogen Lamp (PAR 46 lamp) in an application where we use 12 VAC (60 Hz) through a transformer for the filament voltage. What is the MTBF of Halogen Lamps? What effect would AC have on the MTBF?


Reply:

Subject: Halogen Lamps
Reply Posted by: B.W.Dudley (bdudley@alionscience.com )
Organization: RAC
Date Posted: Tue Jun 25 13:21:50 US/Eastern 2002
Message:
I reviewed our data sources for halogen lamp reliability data. The data results are very limited. What I found was that, the expected “life” for halogen lamps ranges from 3,000 to 10,000 hours. If the units are replaced before failure, the mean time between failure is estimated to be 195,000 hours for a ground protected and controlled environment. With regard to the AC current, it appears that the halogen lamps use direct current so a converter is probably needed to light the lamps.


Back to message list Topics List About this forum
Reply to this message