Dive Rite's Hand-held HID 10W Dive Light delivers 450 Lumens of illumination using the 10W Welch Allyn Solarc™ bulb and Dive Rite SunSpot fixed focus reflector. The very tight fixed focus SunSpot reflector delivers a very high intensity 'hot-spot' that offers the most penetration of the 10W lights. You will get about 3 hours of burn time with MAHA PowerEx 2700mAh NiMH rechargeable AA's (using the MAHA MH-C800S or MH-C801D charger), about 2 hours of burn time with Energizer e2 lithium primary 1.5V AA's and about 1 hour using consumer grade alkaline primary 1.5V AA's.