Original Osram Xenarc D1S Xenon bulb offering 100% higher luminous efficiency, reduced heat output and a much longer lifespan than conventional light bulbs offering excellent visibility and clarity. D1S HID bulbs from Osram have a high colour temperature of 4150K giving a cool white light. Higher the colour temperature, the closer it will be to natural daylight which has a temperature of 6500K. With its high colour temperature, it produces a more concentrated and consistent light beam than regular light bulbs. Thus ensuring excellent clarity and visibility of the road especially at night D1S