eGear Focus Control 200 LED Headlamp Run time is 16 hours at the full 138 lumens; 32 hours on low, 48 hours on flash. Red, green and blue night vision LEDs run for 150 hours, red flash for 300 hours. Three AA batteries in water resistant rear compartment. Smart Switch controls white and colored LEDs separately, and shuts off any mode by holding the switch down. Case is ABS plastic and entire unit weighs only 5 oz.