TrueLight products utilize a unique combination of Dark Red (660nm), Red (630nm), Yellow (850nm) and Near-Infrared (850nm) LEDs that are powered by the same circuitry – meaning that if one wavelength was not working, none of the wavelengths would work. Near-Infrared specifically (and intentionally) appears to be not be working because this wavelength of light is naturally invisible to the human eye. Your eyes simply cannot see the light being emitted by the infrared lights. Don't worry - your device is functioning as intended and those lights are turning on!