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What is the difference between LED T5 lamp tube and T8 lamp tube?

LED light tube

LED T5 and T8 lamp tubes are both types of linear fluorescent replacement lamps, but they have some differences in terms of their dimensions and electrical specifications. Here are the key differences between LED T5 and T8 lamp tubes:

  1. Diameter: The primary difference lies in their diameter. T5 lamp tubes have a smaller diameter of 5/8 inch (15mm), while T8 lamp tubes have a larger diameter of 1 inch (26mm). This size variation affects the compatibility with fixtures designed for a specific tube diameter.
  2. Length: T5 and T8 lamp tubes are available in different lengths, ranging from 2 feet (0.6 meters) to 8 feet (2.4 meters). However, the length options may vary depending on the manufacturer and specific product lines.
  3. Wattage and Light Output: T5 lamp tubes typically consume less power compared to T8 lamp tubes. They are generally more energy-efficient and offer higher lumen output per watt. However, LED technology has evolved rapidly, and there are now high-efficiency LED options available for both T5 and T8 lamps.
  4. Ballast Compatibility: T5 and T8 lamp tubes may have different ballast compatibility. Ballasts are devices that regulate the electrical current to the lamp. Some LED T5 and T8 tubes are designed for direct wire installation, bypassing the need for a ballast, while others are compatible with existing ballasts. It’s important to check the compatibility requirements specified by the manufacturer.
  5. Light Distribution: Due to the difference in diameter, T5 lamp tubes produce a more focused and narrower beam of light compared to T8 lamp tubes. T8 tubes have a wider beam angle, which allows for broader light distribution.
  6. Application: T5 lamp tubes are commonly used in spaces that require more concentrated lighting, such as display cases, task lighting, and under-cabinet lighting. T8 lamp tubes are often used in general lighting applications for offices, commercial spaces, and industrial settings.

When considering a retrofit or replacement of fluorescent lamps with LED alternatives, it’s important to ensure compatibility with existing fixtures and ballasts (if applicable). It’s recommended to consult the manufacturer’s specifications and guidelines for the specific LED T5 or T8 lamp tubes you are considering to ensure a proper fit and optimal performance.

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