2 of 2 people found the following review helpful
This review is from: Blackburn Mars 4.0 Rear Light 2012 (Sports)
Here's how bright this is: if I turn it on and wrap my hand round it, it shines right through my living flesh, except where there's veins - so I can look at the INSIDE of my own hand, and see where the veins are.
I cycle in dark countryside a lot and have never felt safer than since I got this light. No one could possibly fail to see me.
I'm puzzled by the reviewer who claims it's insecure on the bracket. It's actually one of the better designs I've seen - the light won't detach from the bracket at all unless you push down a little lever underneath. It really couldn't fall off accidentally.