With 3pcs XM-L U2 LED,up to 4000lm(Max),when the light working,first mode is low,just the down led working,when the light working at low mode
it can last about 5hours with this 4x18650 battery pack
purchased one to ride at night because of high heat in southern states works very well and very bright, easy to use and mount. purchased another to use as a head torch for walking exercise, watering late evening/night, looking for owls in the trees, working in the attic, under the house and working on automobile....a light everyone can use
Like headlights in a deers eyes.
If you ride night you need a light.
This is not labeled best bike light but this is actually the best light you can get for the price.
I took it out into the wilderness for a night late night ride. Works great, the couple of hikers I ran into did not like it, but I'm glad they could see me coming.
I love these lights!