Since my bike is German made, it's factory equipped with a dyno-hub and steady lights (front and back) which I always leave on; although I did swap out the front light with a B&M CyoT which has automatic daylight/nighttime mode and can be seen quite clearly even in sunny conditions. Funny thing is that I get ALOT of comments from pedestrians and drivers that I've left my lights on (wasting batteries, etc); which means that at least I'm being seen!