On the bike this light works well--bright and compact. However, I question the running time claimed by the manufacturer. I get about 10 hours. I also am quite frustrated by how much time it takes to recharge the thing. Without its battery being fully drained, in my experience it takes in excess of 48 hours of plug-in time to get the elusive green light. Seriously. I have contacted the manufacturer about that, only to be told that, yeah, it takes that long. So if you have the patience to wait, and not the need for the light for a couple days, I guess it's a pretty good product.
I use it as an everyday warning light to make sure others see me. I like the intensity of the light. I do NOT like the length of time it charges for. I wish it lasted longer between charges.
