CREE XML XM-L T6 LED Bike Bicycle Light HeadLight HeadLamp 1200LM 9W 2 in 1 functions: Bicycle light + Head Light Made of CREE XM-L T6 LED, ultra bright Output bright comes to max 1200 lumens. 4 switch modes: Strong Brightness, Normal Brightness, Weak Brightness and Strobe( press button for 3 second). Rechargeable 4400mA battery offers powerful power supply