1. Replace H3 Halogen Bulb. 2. Headlight Version: replace original halogen headlight bulbs in Low Beam, High Beam, High and Low Beam, for Cars, Trucks. 3. Fog Light/DRL Version: only replace original halogen fog light bulb or 12V DRL . 4. Fit in Projector or Reflector Housing Type. 5.Optional colors: 6000K~6500K Xenon White, 5000K Bright White, 3000K Amber Yellow, 8000K Ice Blue. 6.Operating Voltage: 9V~24 V DC Note: Not for use in high/low beam +DRL applications that operate at less than 9V. How To Find The Correct Bulb Size-Click Here