I know this probably won't make a huge difference in the lifespan of the LEDs since they are installed in a PSX and won't be on 24/7 but it just got me wondering... I am driving the LEDs with a 12F629 and throttling them quickly to dim them down some (because they were pretty bright after the initial resistors still). I am wondering what kind of impact this would have on the LEDs' lifespans?