MagicShine 1000-Lumen LED Bike Light Set 1000 Lumen output using only 10 watts of power The LED has a rated life of over 50,000 hours and like all LED's is totally shock proof Light output is digitally controlled to produce constant light output for the entire charge of the battery Output settings: High (3+ hours), Low (12 hours) and Strobe (2 flashes/second) The anodized aluminum light housing is O-ring sealed for all-weather use