No delay to light up, Faster on/off response timeLifespan: 80,000 working hours, stable quality, long service lifeAluminum heat sink design,builtin automotive circuit to prevent electronic interference.The model is the same as factory light, no need to change car wire rute,just Plug and Play, NO modification requiredEnergy saving, environmental protection, Stable performance, through strict test, Use safer driving in the car:Super Bright One Pair(2 Bulbs) H4 / 9003 / HB2 80W/ bulb ,4000LM/ bulb 6000K LED Bulbs Headlight Conversion Kit High And Low Beam / Fog LightFEATURES:Bulb Size: H4 / 9003 / HB2Application: Headlight High Beam And Low Beam / Fog LightLED replacement bulbs are engineered for superior performance, exceptional looks, and increased safety.LED chip high power 40W per bulbColor Temperature: 6000K Clear WhiteLumens: 14000 lumens per bulb,no blind zoneWorking Voltage: DC 12V to 24Vcolour:SilverMaterial:Aluminum alloysize:Single size approximately: 7 x 5cmPackage Contents:2