Night Fision Tritium Night Sights provide a greater level of visibility, accuracy, and durability. Through precision engineering, we have designed a proprietary sighting system, creating a brighter and more durable ring, called The Perfect Dot™, which provides maximum visibility both day and night. The Perfect Dot™ is the brightest pistol sight available on the market, resulting in superior illumination to increase accuracy through its use of optimized fluorescent rings for daylight environments and the brightest tritium dots in dark conditions. (less)