Features Copper InfraRed LED Module 940nm 1350mW. With our 66LR and 66LRX light, this LED module will shine further then any 940nm Infrared light on the market we know of by a long ways. Out to 1200+ yards with GEN 3 night vision. Our 850nm IR LED module will shine further but when you look directly at the IR LED the 850nm IR will have a much brighter red glow to it then the 940nm IR. Please note that the light output from this Infrared LED module can not be seen with the human eye and you will need a night vision device to see the light output. This module will work in all our 30LR, 38LRX, 50LR, 50LRX, 66LR, 66LRX and Tim Wells slocker lights. Will not work in any of our Destroyer, Mini-Sniper, 20LRX or Exterminator lights or any other manufactures lights. See our Technical Specs for the distances you can expect to see with Gen 3, Gen 2, Gen 1 and digital night vision devices.