Copper InfraRed LED Module 850nm 1350mW. With our 66LR and 66LRX light, this LED module will shine further then any 850nm Infrared light on the market we know of by a long ways. Out to 1700+ yards with GEN 3 night vision. 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.