Princeton Tec Apex Pro 3-Watt LED Headlamp (Black with Green LEDs) 3 watt Maxbright LEDs paired with calibrated optics provides intense, bright light at long range Now provides up to 130 lumens of light. Maximum viewing distance of 96m. 1.5 to 12 hours regulated burn time. 15-35 hrs of unregulated. 4 Ultrabright LEDs for close range tasks and wide angle Ultralight battery pack uses two CR123 lithium batteries Regulated LEDs on all modes provide constant light output. Battery power meter indicated high, medium or low battery life