These lightweight aluminum lights lock to your handlebars and seat post with custom security bolts, and are guaranteed to last forever - If they're ever stolen, broken or water damaged, Fortified will replace 'em! Swap batteries on the go with removable, rechargeable USB batteries. 150 lumens in the front perfectly illuminates city streets, while 30 lumens in the rear keeps drivers alert. If you're looking to fully illuminate the darkest suburban paths and urban alleyways, try the Boost version with 300 lumens in the front and 60 lumens in the rear to keep drivers at a distance.
They're relatively difficult to steal... The screws are pentalobe with a post: obscure but not unheard of. After the first theft, I "fixed" that by filling up the screw head with superglue. The most recent crackhead managed to steal half of the light, which isn't really going to work out so well for them.
They're bright and the batteries last a pretty long time. My only real complaint is that they turn on with a single tap, so often passing strangers using the same bike rack as me manage to turn them on accidentally, and I regularly come out to discover a dead battery.