Fluorescent lamp tube T4,T5,T8,T9,T10,T12 How long is it?

"T" stands for tube, and the number after the T is the diameter of the tube. t8 is 8 T's, and T is 1/8 inch.

One inch equals 25.4 millimeters. So each "T" is 25.4 ÷ 8 =

The diameter of a T12 tube is (12/8) × 25.4 = 38.1 mm.

The diameter of a T10 tube is (10/8) × 25.4 = 31.8 mm.

The diameter of a T8 tube is (8/8) × 25.4 = 25.4 mm. 4 = 25.4mm [the diameter of the T8 is exactly 1 inch] (Note: the width is uniformly 39mm and the height is 52mm).

Expanded information:

Length and power of ordinary fluorescent lamps: (20w 620mm long) (30w length 620mm; 30w926mm long; 40w length 1230mm)

T5 tube diameter (5/8) × 25.4 = 16mm (Note: are 23.5mm wide, 39mm high)

Ordinary fluorescent lamps length and power: (8w length 310mm; 14w570mm long; 21 watts of 870.5mm long 28w 1170.5mm) length; 35w length 1475 mm)

T4 lamp diameter (4/8) × 25.4 = 12.7mm (Note: equal width 21mm, height 32mm)

Length and power of ordinary fluorescent lamps: (8w length 341mm; 12w443mm length; 16w487mm length; 20 watt 534mm length

22w734mm long; 24w874mm long; 26w1025mm long; 28w1172mm long)

The diameter of T3.5 tube is (3.5/8) x 25.4 = 11.1mm

T2 tube is (2/8) x 25.4 = 6.4mm