CREE XM-L2 LED
Successor to the MJ-808 LED bike light, the MJ-900 bike lights rechargeable has a beam angle of 20 degrees, so slightly wider than the MJ-858 bike LED lights with a soft hot spot in the center. This bike light great for an entry level MTB light or as an MTB helmet light.
If you are getting this item for your helmet, you might also consider the MJ-6058 helmet mount and MJ-6016 extension cable and store the battery in your backpack.