High Humidity Effects on Fluorescent Lights

Fluorescent lighting uses less energy than conventional incandescent lighting, and it is used widely in commercial and residential applications. As with all electrical circuitry, fluorescent lighting and water do not mix, and precautions must be taken to operate them safely in areas of high humidity.

  1. History of Fluorescent Lighting

    • Fluorescent lighting has been used widely in office and industrial settings since the 1940s, and manufacturers began promoting compact fluorescent bulbs to homeowners in the late 1990s. Many residential owners are attracted to the operational cost savings offered by the use of fluorescent lighting, but most are put off by the high cost of replacement bulbs.

    Electrical Shock Hazard

    • When using fluorescent lighting in wet or very humid areas, it is important to ensure the bulb or ballast is grounded properly. Most modern residential electrical wiring incorporates an electrical ground into the circuitry. Whether using a traditional fluorescent with a ballast or a compact bulb, always ensure the fixture has been installed and grounded properly. Fluorescent bulbs run cooler than incandescents, and water may condense on the exterior of the bulb, presenting a significant shock hazard in an ungrounded fixture.

    Corrosion

    • The prongs on a traditional fluorescent tube are made of metal and are relatively exposed to the surrounding air even when installed in a fixture. Exposing the bulb to moist air will cause these prongs to corrode, reducing the performance and life of the bulb. It is advisable to avoid using fluorescent bulbs in wet or humid areas, opting instead for a sealed incandescent, mercury vapor or LED light source.