H4 LED Bulbs SR1

Original price was: $129.95.Current price is: $119.90.

Kit Includes:

  • 2 x  H4 Low & High LED Bulbs – SR1
  • Built in Drivers


  • 4,000+ Lumen at 6500K/Pair
  • Seoul CSP LEDs
  • 2.5x Brighter than halogen
  • Use only 21W per bulb
  • Last up to 10 years
  • Waterproof , vibration resistant
  • Air Cooled, no fan required


H4 LED Headlight Bulbs | H4 LED Conversion Bulbs | H4 LED Conversion Kit | SR1 4000 Lumen

Upgrade your vehicles headlights or fog lights with the powerful SR1 LED headlight bulbs. Get up to 2.5 times the amount of light on the road compared to most standard halogen bulbs. Increase your confidence while driving in the darkest conditions. The SR1 LED headlight bulbs are powered by the latest Seoul LED technology’, specifically designed for use in automotive forward lighting systems. These automotive LED bulbs have a total luminous flux of 4000+ Lumen per bulb. Brilliant cool white light from the Seoul LED chips create an enhanced level of visibility and improved illumination where you need it most. Installation only takes minutes in most cars, trucks or motorcycles. The simple plug-n-play LED bulb eliminates the need for any wiring harness, relay kit or ballasts. Just plug in and go! Instantly you’ll have up to 250% more light to deliver a much brighter and safer driving experience. The SR1 LED headlight bulbs have an adjustable base that allows you to ‘tweak’ the bulb position to get an accurate beam pattern. This reduces unwanted glare or dazzle towards other drivers and optimizes the output for the driver. The powerful SR1 LED headlight bulbs are super efficient using less than half the power of most halogen bulbs. Cool running, they are safe to handle even when they are on. The new SR1 LED’s offer a amazing value for the performance. The SR1 LED bulbs will even match or out-perform most HID / Xenon bulbs. These H4 LED headlight bulbs have low and high beam in one bulb and come ready to install. They can be used for retrofitting or converting nearly any headlight or fog light that uses a H4 , 9003, HB2 or P43T based halogen bulb.

Installation Tips:

  • Remove old halogen bulb
  • Connect LED Driver and LED Headlight Bulbs together
  • Plug Connector from Driver to Vehicle Harness
  • Loosen set screw with included Allen-key to allow bulb adjustment
  • Install LED bulb into headlight
  • Turn bulb until the light output is focused accurately
  • Tighten set screw to insure bulb wont move during use
  • Base is reversible if bulb doesn’t fit inside headlight housing


  • H4 LED Headlight Bulbs, H4 LED Conversion Bulbs
  • H4 Low Beam or H4 High Beam
  • P14.5S Low Beam or P14.5S High Beam
  • H4 Fog Light or P14.5S Fog Light

Still Have a question? Check our FAQ page for more information about LED and our products.

Additional information

Weight 0.5 kg