The lights will always have a black barrel. Choose a blue, green or warm white light. The color of the tail cap matches the color of the light beam. It comes with two AAA batteries packaged in a black presentation box. Bright LED light. Choose the color of light for the job at hand. Blue – Low-light reading – preferred light by pilots or truckers. Forensic personnel/crime scene technicians or hunters – use to detect bodily fluids. 54 Lumens/31M Distance. Green: Protects night vision, avoids eyes strain & most wildlife and insects do not react to it. Green LED flashlights can be seen up to one mile away. 78 Lumens/88M Distance. Warm White: Similar to the sun’s natural light, good for most applications, reduces eyestrain, & colors look more natural. 68 Lumens/83M Distance.