This flashlight uses High-Output Infrared LED's that seems invisible to the naked eye, but when seen on camera, it shows as working LED's. It is also the first Infrared Instructables posted.
Step 1: Materials
3. Soldering Iron
**This can work with any LED flashlight**
Step 3: Second...
2. Solder in the 6 High-Output Infrared LED's being careful to check the polarity