Fits only our 40KAP headlamp. Will not work in any other lights Your choice of color(Red,Green,White,InfraRed) The color of LED module determines the color of light the 40KAP will emit Choose your color above in the options Red shines 473 yards and puts out 47,000 Candela Green shines 874 yards and puts out 159,751 Candela White shines 800 yards and puts out 134,244 Candela IR(InfraRed) 850nm shines over 1000 yards using Gen 3 night vision and 400 yards with digital night vision IR(infraRed) 940nm shines over 700 yards using Gen 3 night vision and 300 yards with digital night vision Only takes about 30 seconds to replace LED module in the 40KAP headlamp and no tools needed