T5

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T5 refers to those types of straight aquarium fluorescent lighting tubes which are five eighths of an inch (1.587 cm) in diameter and use a G5 bipin socket.

These tubes are typically more efficient and brighter than T8 tubes.


  • You require a specific ballast unit to drive T5 tubes. You can not use a T8 ballast.
  • Metric version is called T16

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