The Hope R8+ LED Vision Bike Light is the flagship light from Hope's range, giving 4000 lumens on max power. The eight LED’s generate a maximum power of 4000 lumens (3000 measured), the 6 power levels allow you to adjust the light appropriately for each situation.  Hope R8+ LED Vision Bike Light Features Eight LED’s generate a maximum power of 4000 lumens (3000 measured) 6 power levels Quick release bayonet fitting handlebar mount 9600mAh ES Li-Ion battery pack with built in power gauge 1 hour burntime on full power Visual indication of power levels via illuminated switch Integrated thermal throttling prevents overheating Custom lens - 4 x spot, 2 x diffused and 2 x elliptical beams Weight - Lamp 180g, total system 690g