Ideal for viewing plants at night without disturbing their growth cycle. The lightweight, compact Green Eye Headlight easily adjusts, with its elastic band and tilting light mount. Ultra bright green LED bulbs with 100,000+ hours of burn time. Customize your lamp settings with one click of the button. The settings are: 4 lamps, 8 lamps, all lamps, and flashing. Water resistant. Allows hands-free tasking. Uses three AAA batteries (not included).