Originally Posted by n4zou
My helmet has one of those plastic adjustable bands on the back and a blinkie will clip right on it. You can't feel it when it's clipped back there. Any blinkie with a belt clip on it will work just fine.
Mine too, and if you don't mind a bigger blinkie, I'm finding that the Planet Bike Blinky 5 is good. The lens is a reflex reflector, so the whole thing will reflect if it's getting hit from the rear with headlights, and the LEDs are surprisingly powerful for a budget-priced blinkie. In fact, the hotspot is a bit brighter than my NiteRider daytime-visible blinkie.
The Blinky 5 is natively a clip-on blinkie, so it goes right onto the helmet's occipital-lobe band.