[ QUOTE ]
idleprocess said:
Remember that those lifespan numbers depend on laboratory temperature conditions (junction temp of 25C) that just isn't going to happen in most apps.
[/ QUOTE ]
Incorrect.
DS25 (Luxeon emitter DS) on page 11, and DS45 (Luxeon III DS) on page 9 both state that the lifetime estimate is based on Tj <= 90C.
DS40 (Luxeon V portable DS) on page 8 states different lifetime estimates based on 3 heat sink temperatures of 35C (700mA), 75C (700mA), and 85C (600mA). If heat sink = star board, then that would roughly translate to Tjs of 87C, 127C, and 130C respectively.