what baffles me is that the same seller sells a P7, single cell light that I gave glowing reviews too.. The P7 from that seller is by far the longest P7 I own but puts out a great amount of light and has great runtime too.. The light you just bought is huge by comparison.. You are going to have to go to home depot to find something to mount that on your bike, it is just huge for a bike light..

The thought that you are going to be blinding riders and cars is way overblown.. I use 2 - p7 to ride all the time, probably putting out over 1000 lumens in total.. You aim your best flood right in from of you and your best thrower to the outer edge of the flood and for me this is ideal lighting for fast nightime training.. There is absolutely no reason to be aiming to your light straight down the road, everything you see will be 10-20 feet in front of you..