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An exciting new family of bulbs that offer up to 90 percent more light, whiter/brighter illumination, and up to 100 feet more range than conventional bulbs, all while offering up to 50 percent longer life. The magic is in the chemistry, PIAA Night-Tech bulbs use an innovative new blend of gases with a higher proportion of inert gases, coupled with a new and exclusive filament material. In addition, illumination is enhanced through the use of unique dual band coatings engineered to optimize the output generated by the new materials. Bulb Type: H4, Kelvin Rating: 3600K. Night-Tech 60/55 watt bulb with an equivalent output of 110/100 watts, Sold Each.