T5 Lamps Vs. T8 Lamps

Fluorescent lamps are some of the more energy-efficient lamps on the lighting market. T5 lamps as well as T8 lamps are both different types of fluorescent lamps. There remain only subtle differences between the two, however. These lamps are typically employed to replace high energy consuming, high intensity discharge lamps.

  1. Applications

    • Both types of lamps are designed for different applications. T5 lamps can be found in smaller light fixtures that provide more localized lighting like desk lamps. T8 lamps are employed for wider light coverage. T8 lamps are found in light fixtures located more than 18 feet from ground level.

    Facts

    • While both lamps produce similar light outputs, one of the biggest differences between these lamps is peak output operating temperature. Peak light output for a T8 lamp occurs at temperatures near 77 degrees Fahrenheit, according to Facilities Net. Peak light output for a T5 lamp occurs at a much higher temperature, around 95 degrees. Both lamps are manufactured to last for around 20,000 hours, according to First Source Light.

    Drawbacks

    • All fluorescent lamps, including T5 and T8 lamps contain an average of 5 mg of toxic mercury, according to Earth Easy. Only in cases where a lamp breaks does the mercury pose a health threat. The ballasts used for T5 applications can sometimes overheat and break. Another drawback linked with T5 ballasts is that they can take several minutes to kick in and begin the light emission process.