just picked up a set of these, i needed a bright light for urban paved trails and night riding.
my previous planet bike 1 watt super flash set gave out on me 5 times due to vibration through the handle bars.the headlight switch would bounce and turn itself off or the body of the lamp and battery would separate, though the twist connection would still be in place, the rachet mount can also fail from vibration or shock. i had a lot of duct tape and electrical tape solidifying my old light rig. i also used as many of those rubber and plastic widening devices they have to help absorb the shock also the tail light failed from water seeping into the case once.
i picked up the head and tail light, they are rechargeable which is my favorite feature. so far they are uber bright the tail light at just 30 lumens is very bright, lights up my rear wheel and cog and spokes its all black but it looks red!
the head light comes in at 90 lumens and its fairly bright to light up things close by. not really a projection head light, just a bright led strip for lighting up, up to 10 feet or less in front of the rider. the bright and dim are reasonably different in output but either one will still light your way. the flashing modes are not unique which i don't like they are just a normal flash mode.
i like that you can mount them practically anywhere! fork, stem, handlebar, seat post, diagonal, the straps stretch and do not fatigue and then i finally decided to wrap only one strap on my handle bar stem, it lights up both sides of my front wheel and the strap holds really tight. its similar to a knog frog strap. the silicone casing of the light molds to any circular object. the rear light i mounted on my seat post, it shines in all directions from that point. the rear light can be mounted anywhere i put mine on my seat post because its black and it matches and disappears when its mounted. other places you could put it on your rear triangle but it gets pretty low or possibly a helmet.
video from the same night http://youtu.be/fZlQSG13v0w