i ride my bike every day, to work and back, sometimes in the dark both ways. these are a third set of SMART lights i bought, cause i like them so much i keep giving them to friends. they last very long on a set of batteries, they are visible from afar, the white, front light is not much for brightening up a pathway home, but it makes you safe and visible to motorists. the initial installation is a breeze, and clipping them on and off extremely easy and time efficient, yet they don't jiggle about. once clipped in they stay on, even in rough terrain. sturdy construction, long lasting, water proof, also: when the time comes to change the batteries it is a breeze as well, and no fiddling with weird tools, just a coin of any kind opens them up.
all n all 100% good stuff! if you need simple, great working bike lights search no further!!!!!
for a front light that actually lights the way, try this: High Power Super Bright Heavy Duty 3W 1 Led Waterproof Front Bike Light - Black
works like a charm!