9003 vs. H4 Headlights - What's the difference?

Auxbeam® H4 9003 led headlight bulbbrightest wireless led headlight bulbs

Voltage Automotive 9003 HB2 H4 Polarize White Headlight Bulbs

LED Car Lights Bulb MAXGTRS - 2× 3-Colors Switch Car LED Bulb Headlight Fog Light H1 H4 H7 H8/H9/H11 9005 HB3 9006 HB4 9012 6000K 3000K 4300K Warm White Gold 3 Colors — maxgtrs

For Fog Lights & Powersports Vehicles: Update your vehicle's lights with LED clarity and performance Superior 6000K cool-white LED Bulbs: Designed for

SYLVANIA 9003 | H4 LED Powersport Headlight Bulbs for Off-Road Use or Fog Lights - 2 Pack

BEVINSEE H4 9003 High Power LED Bulbs Hi/Low Beam Motorcycle Headlight

AUXITO H4/HB2/9003 LED Headlight Bulb with Fan, 100W 20000LM 6000K Whi

Fit type: Vehicle Specific Whiter light for added clarity Legal for on road use Brighter headlight = more downroad visibility

SYLVANIA - 9003 SilverStar - High Performance Halogen Headlight Bulb, High Beam, Low Beam and Fog Replacement Bulb, Brighter Downroad with Whiter

Philips X-tremeVision Pro150 offer a huge increase to light output without sacrificing lifespan. Up to 150% brighter than standard. Buy today at PowerBulbs.