My girlfriend and I each have a similar light with the same bulb(Cree XML T6), and it is an excellent light.

While not 1200 lumens, they are astoundingly bright. I've been told multiple times "I thought a car was behind me" while on group rides at night.

The battery pack is rather cheaply put together, but the lifespan is good. Around six hours across two rides, at full brightness.

Would recommend it to anyone.