This Ushio BCA Incandescent Photoflood Lamp (250W / 115-120V) has been frosted blue in order to give it a color temperature of 5,760K. This makes it much easier for photographers, videographers and DPs to balance the light source in situations with high ambient daylight. The E-26 screw-in base is compatible with any socket which accepts a 250W lamp with or without a reflector.