Nebo Transcend Rechargeable Headlamp 1500 Lumen

LIGHT MODES
Turbo (1,500 lumens) - 30 second intervals* / 129 meters
High (750 lumens) - 4 hours / 91 meters
Medium (300 lumens) - 5.5 hours / 58 meters
Low (30 lumens) - 28 hours / 18 meters
Strobe (750 lumens) - 4 hours / 91 meters
*Turbo mode is designed to give you short bursts of power when you need it most. After 30 seconds, the light will return to the previously used mode to prevent the light from overheating and protect the battery. Turbo mode can be reactivated at any time.