I have a CatEye Volt800 and like it. I had before (still use a spare, which you should have if you plan on doing night riding) a 150 lumen but it's not bright enough when road is unlit or cars coming in the opposite direction blinds me. I also bought before a cheap '3000' lumens chinese light which was closer to 500 lumen and a light pattern that made drivers mad at me. Two features I like of the Volt are its 'HyperConstant' mode which gives you a constant 200 lumen/800 lumen pulse and the ability to switch to high output by a double press of the power button. A single press of that power button brings you back to its previous mode. You can buy extra mounting brackets and the light is very easy to install/remove from the bracket. In Hyper/Constant mode, the battery is rated to last 7.5 hours and 2 hours in full 800 lumens. The battery is also removable so you can increase running time by simply swapping batteries.