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Light Bulbs >  FLOURESCENT TUBES AND LIGHTS  >  Fluorescent Tube Sizes

Fluorescent Tubes Sizing Informtion Fluorescent Tubes Sizing Informtion
Not sure which type of tube is right for you? Below are a list of our tube diameters to make your decision a little easier!

T4 = 14mm Diameter
T5 = 16mm Diameter
T8 = 25mm Diameter
T12 = 38mm Diameter

Many of the older style T12 tubes have been replaced by more energy efficient T8 tubes. The pin spacing is identical it is simply the diameter that is different.

T12 tubes T8 tubes to switch to:
T12 20 Watt 2 ft = T8 18 Watt 2 ft
T12 30 Watt 3 ft = T8 No 3ft eqv.
T12 40 Watt 4 ft = T8 36 Watt 4 ft
T12 65 Watt 5 ft = T8 58 Watt 5 ft
T12 75 Watt 6 ft = T8 70 Watt 6ft


Light Bulbs >  FLOURESCENT TUBES AND LIGHTS  >  Fluorescent Tube Sizes