White light emitting diode (LED) with off-white color and high performance produces a brightness level of 1,000 lumens in the yellowish-green range, which is ideal for human vision. The Precision TIR lens forms a focused and concentrated beam of light while also providing ample peripheral illumination. The ambidextrous push/toogle switch enables easy and convenient momentary or constant activation with just one finger. The integral aluminum t-slot mounting system securely attaches the light to handguns and long guns that have MIL-STD 1913 rails. The construction of the light is made from high-strength aerospace aluminum with Mil-Spec Anodizing and a coated, tempered window. The runtime for the white light option is 1.25 hours, and it has an IPX7 waterproof rating for up to 1 meter deep for 30 minutes.