CrossFire Micro Hat Clip LED Light 10 Lumens CR2016 Li-ion Green Light. It weighs less than an ounce and the top mount design does not obstruct your vision. Specifications for CrossFire Micro Hat Clip LED Light: Manufacturer: CrossFire Color: Green Light Output: 10 lumens Battery Type: Lithium Metal CR2032 Bulb Type: LED Finish: Black Package Contents: CrossFire Micro Hat Clip LED Light CrossFire CYCMHCG: Micro Hat Clip LED Light 10 Lumens CR2016 Li-ion Green Light