Cyclops 250 Lumen Headlamp w/Green COB LED Side Illumination Uses 3 x AAA. ; Powered by (3) three AAA Energizer alkaline batteries; On/off switch Specifications for Cyclops 250 Lumen Headlamp w/Green COB LED Side Illumination: Manufacturer: Cyclops Color: Black Light Output: 250 lumens Additional Features: On/off touch pad Battery Type: AAA Bulb Type: LED Battery Quantity: 3 Package Contents: Cyclops 250 Lumen Headlamp w/Green COB LED Side Illumination Cyclops CYC-HL250: 250 Lumen Headlamp w/Green COB LED Side Illumination Uses 3 x AAA