Its an awsome light, one of the better ones for EDC, great output and its got prettty good runtime.

But for cycking forget it.

The 850lumen mode is only a 4min turbo mode, and then it steps down to a lower power, then again after half an hour, on the second step down its only 170 lumens, no good for cycling but still an awsome torch.

The beam is actualy very good for cycling, nice and floody, with a wide hotspot, although it dosent have great throw TBH. would be good on the helmet and leave it turned off or on low, and the turn it up to turbo / high for decent, but no good as a stand alone light.

Head over to CPF (CandlePowerFourms) to cheack out the reviwes of it and more suitable options.