On Wednesday 16 July 2008 15:21:58 Joe Bento wrote: > I am most curious, and perhaps someone can answer. You mention that the > white LED might fail within a 2x magnitude of 100k hours. 100k hours is > about 11.4 years. How is MTBF estimated or calculated? I don't think > they light an LED at its recommended current and wait - white LEDs > haven't been around that many years. Voodoo?? -- with metta, Shawn Tan Aeste Works (M) Sdn Bhd - Engineering Elegance http://www.aeste.net -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist