Putco PowerSports Nitro Blue Halogen Bulb H4 60/55 Watt 230004NB-S Putco Nitro Blue Pure halogen bulbs in 6000 Kelvin (non DOT approved) offer a rich, blue color for those that want that custom look These bulbs improve driver awareness and are a direct replacement to your factory headlight or auxiliary bulbs Lifetime Guarantee Constructed of the highest grade materials Sold each