The lights will always have a black barrel. Choose an LED blue, green, red or warm white light. The color of the tail cap matches the color of the light beam. It comes with a key ring/lanyard attachment and one AAA battery packaged in a black presentation box. Bright LED light with spot-to-flood beam. Choose the color of light for the job at hand. Blue: Low-light map reading or detecting bodily fluids. 14 Lumens/25M Distance. Green: Protects night vision, avoids eyes strain & most wildlife and insects do not react to it. 30 Lumens/41M Distance. Red: Enhances contrast & protects night vision. 33 Lumens/35M Distance. Warm White: Similar to the sun’s natural light, good for most applications, reduces eyestrain, & colors look more natural. 32 Lumens/38M Distance.