T8, etc. represent the interpretation of the meaning of
T represents the tube diameter.
Each T is 1 / 8 inch, one inch equals 25.4 mm.
T8 lamp is then the diameter of 25.4mm.
People often use "T" to describe the tube diameter of a few ---- for each "T" number indicates 1 / 8 inches (0.125mm)
T = 1 / 8 inch, 1 inch ≈ 25.5mm, so:
T3 = T × 3 = 1 / 8 英寸 × 3 = 1 / 8 × 25.5mm × 3 ≈ 9.56mm
T4 = T × 4 = 1 / 8 英寸 × 4 = 1 / 8 × 25.5mm × 4 ≈ 12.75mm
T5 = T × 5 = 1 / 8 英寸 × 5 = 1 / 8 × 25.5mm × 5 ≈ 15.94mm
T8 = T × 8 = 1 / 8 英寸 × 8 = 1 / 8 × 25.5mm × 8 ≈ 25.4mm
T12 = T × 12 = 1 / 8 英寸 × 12 = 1 / 8 × 25.5mm × 12 ≈ 38.25mm
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