Read before placing an order: Socket Models & Sizes: -High / Low beam: H4 With 3 Sides COB LED Bulbs. -Single Beam: H1 H7 9005 HB3 9006 HB4 With 2 Sides COB LED Bulbs. Notice: -Different models (H1 H4 H3 H7 .....) has different plug. Please check pictures carefully when you ordering. -Please double check if wiring correctly or not. Specifically, The Positive and the Negative. Most of problems can be solved when you wiring it well. If you do not understand how to use it, please contact us. Product Problem : Your parcel will be sent very quickly after you make the order. If there is any problem about this prdouct please contact with us before dispute. We will try our best to solve problems. S2 LED headlight: Wattage: 72W / Pair, 36W / Bulb Hight luminous efficacy Flux: 8000LM / Pair 4000LM / Bulb Waterproof: IP68. Voltage: 9V to 36V. Wide-range voltage, constant urrent control, anti-interference circuit design. Apprication: Upgrade for Car, Trunk, SUV, RV HID Xenon Headlight, ALL IN ONE Style, no extra driver needed. Beam Angle: 360 Long range: 6500K color temperature and 200m light range. What is color temperature? Color temperature is a way to describe the light appearance provided by a light bulb (lamp). It is measured in degrees of Kelvin (K) on a scale from 1,000K to 10,000K. What are Lumens? Lumens measure how much light you are getting from a bulb. The more lumens, the brighter your light will be. When you're looking for new lightbulbs. Designed in All in one heat conduction, help to blow heat away continuous, However other seller led lamps design in separately heat conduction which could not blow heat away well, so it would be much more hot when it working. Real shot in outside road with our car LED headlights. High Low Beam Lighting Effect. Comparison between LED bulbs & holagen bulbs in terms of brightne, lifetime, start time and power. Led lights would be much brighter, longer lifespan, fast start and more powerful. As we all know, many low quality led lights exist the problem of lumen depreciation.