What’s The Difference Between Halogen Bulb Types H3, H4, H7, Etc.

Posted in Headlight Bulbs | Asked on Aug 19, 2010
  • Will eventually become a strobe light on my ultralight aircraft.

    There are 2 Answers for "What’s The Difference Between Halogen Bulb Types H3, H4, H7, Etc."

    1. Frank M says:

      They are different fitment,the globes are different shape.

    2. Life Is Good says:

      H – Halogen
      # – base type for fitting to different sockets

      Not suitable for a strobe light. That requires a ‘special’ strobe bulb. A halogen bulb used as a strobe will fail after a few hours. Strobe bulbs are specific to the application.