For the past 6 months I have been using the cat eye orbit wheel light. It clips onto my bicycle wheel spokes. By squeezing the housing the light turns on. It makes a soft, but bright, illuminated glow which spins with my bike wheel while riding down the road. I have seen car drivers noticing the lights.
There are two remarkable things about the orbit. First, in 6 months of parking my bike on the street I have not had to change the battery once. Second, ask any cyclist in San Francisco how long they expect their bike like to last before it's stolen by some thieving hipster. The answer is "not long." I don't have to worry about the orbits being stolen because they look like old fashioned reflectors.
I love em.
There is a similar product from Nite Ize called the Spoke Lit, but I haven't tried it.
–Andy Bot
[Note: Some people have complained about these being shipped in "try me" mode. To turn it off simply push and hold the button for 10 seconds or until the light flashes rapidly and then let go.– OH]
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