HB4 LED headlight bulbs waterproof, 3000K/4300K/6000K, 2PCS1、3-Color Design: 3 colors can be switched at will, the headlight bulb can switch between 6000K white light, 4300K white+yellow light, and 3000K yellow light to meet your driving needs. Simply turn on/off to switch to the desired light color. 2、Premium Lamp Beads: Equipped with 12 high-brightness CSP dual-color 3570-55mil CSP chips, the luminous brightness far exceeds typical halogen bulbs, and the light is fuller and shadow-free. Premium quality lamp beads improve visibility in darkness and bad weather. 3、Weatherproof Design: The carefully designed LED lights can adapt to different extreme weather conditions, such as foggy days, rainy days, hazy days, or heavy snow days, without worrying about bulb damage. 4、Great Heat Dissipation Effect: The lamp bead substrate is made of premium quality copper sheets, with better heat conduction. The substrate is tightly combined with the aluminum lamp body, fully in contact, allowing the temperature of the lamp beads to be quickly and efficiently transferred to the bottom fan, greatly improving the heat dissipation effect. 5、Constant Current Intelligent Temperature Control Module: The external temperature control intelligent drive can recognize the lamp body temperature, share the heat, avoid the risk of burning the lamp and the light decay problem caused by temperature, reduce the headlight temperature, and extend the lifespan.