jonp745765wrote a review of Lezyne Femto Drive Front Light on April 24, 2014
Familiarity: I've used it once or twice and have initial impressions
I ordered 4 of these to have as emergency lights on commuter bikes, and 50% of the lights did not work at all. There is a reason these are cheap, they are cheaply made junk. My other, also cheapo, Blackburn versions actually work. Plasticky and ugly as they are, they work as emergency lights, which the Lezynes obviously do not.