As a child, if I rode my bike after dark, I'd have to rely on my bike's reflectors and, occasionally, a flashlight to keep me visible. However, today's cyclists have gadgets like the Pedalite Anklelite to help keep them safe.
This Anklelite is a solar-powered floodlight. According to Pedalite, users can expect at least three hours of use from the light in strobe mode; however, it doesn't say how often it will last when not being used as a strobe.
I think the real benefit from this, other than safety, is that you never have to buy or replace batteries. Just keep the Anklelite near your bike gear, and in the sun, and it's ready to go when you are.
According to Pedalite, "The Anklelite's robust design and versatility enables it to be also used as an arm light on the upper or lower arm--perfect for jogging, cycling or riding." It can be used as a strobe or a solid light. Also, says the company, it's weather- and impact-resistant, so it should survive the occasional fall or rain shower.
No word yet on when the product will be available from Pedalite North America, but it's going on sale in the U.K. for ?10 (about $18) in December.