Pulse Start Metal Halide Vs. Regular Metal Halide

Halide bulbs and fixtures are used by aquarium enthusiasts seeking deep light penetration. The bulbs provide intense light for tanks containing photosensitive organisms such as corals and live plants. Pulse start halides and regular metal halides, also known as probe start, differ in how the bulbs are initially ignited.

  1. Pulse Start Halides

    • Pulse start halides are commonly used in European halide fixtures. Ignition for the bulbs is found inside a ballast that is also contained in the fixture. A high voltage pulse is generated and brings the bulb to life. Pulse start halides take less time to "warm up" or come to full brightness than probe start halides and may have a longer bulb life.

    Probe Start Halides

    • Probe start halides contain an igniting mechanism within the bulb itself. Tungsten sputters each time the bulb ignites and can cause the bulb to blacken over time. These bulbs may run hotter than pulse start bulbs due to the energy generated during ignition.

    Considerations

    • While some probe start bulbs will operate in a pulse start ballast, crossing fixture types is not recommended. This may shorten bulb life, which averages 12 months when used correctly.