I have been thinking, is it possible to have this tiny circuit in leds such that it turns the LED on 10% of the time on and 90% of the time off? And to do that without anyone noticing flickering, it would have to switch at a extremely high rate. 1 ms on time, 9 ms off, 1 ms on, 9 ms off and so on. Is it possible? Maybe not with a PWM but some of our talented circuit designers here can do something about this?