No delay to light up, faster on/off response time. Lifespan: 80,000 working hours, stable quality, long service life. Aluminum heat sink design, built-in automotive circuit to prevent electronic interference. Same model as factory light, no need to change car wiring, just plug and play, no modification required. Energy saving, environmental protection, stable performance, through strict testing, safer driving experience. Super bright one pair (2 bulbs) H4 / 9003 / HB2 80W per bulb, 4000LM per bulb, 6000K LED bulbs headlight conversion kit for high and low beam or fog light. Features: Bulb size: H4 / 9003 / HB2 Application: Headlight high beam and low beam / fog light LED replacement bulbs engineered for superior performance, exceptional appearance, and increased safety. High-power LED chip, 40W per bulb Color temperature: 6000K clear white Lumens: 4000 lumens per bulb, no blind zone Working voltage: DC 12V to 24V Color: Silver Material: Aluminum alloy Size: Single size approximately 7 x 5cm Package contents: 2 x LED bulbs H4 / 9003 / HB2 super bright white Note: Only the above package content is included; other products are not included. Lighting and display differences may cause slight color variation between the item and the image. Measurement error allowance is +/- 1-3cm.