Commonly used LED fluorescent lamps have T8, T5, and T4 lamps. The three lamps used by enterprises are usually T5 lamps. The LED fluorescent lamps commonly used in the past have T10 and T12 specifications.
"T", which stands for "Tube", means tubular, and the number after T indicates the diameter of the tube. The T8 has 8 "T" and a "T" is 1/8 inch.
One inch is equal to 25.4 mm. Then every "T" is 25.4÷8=3.175mm
The diameter of the T12 tube is (12/8) × 25.4 = 38.1 mm
The diameter of the T10 tube is (10/8) × 25.4 = 31.8mm
The diameter of the T8 tube is (8/8) × 25.4 = 25.4 mm [T8 is just one inch of the diameter of the tube] (Note: uniform width 39mm, height 52mm)
Commonly used fluorescent lamp length and power: (20w length 620mm; 30w length 926mm; 40w length 1230mm)
The diameter of the T5 tube is (5/8) × 25.4 = 16 mm (Note: uniform width 23.5mm, height 39mm)
Commonly used fluorescent lamp length and power: (8w length 310mm; 14w length 570mm; 21w length 870.5mm; 28w length 1170.5mm; 35w length 1475mm)
The diameter of the T4 tube is (4/8) × 25.4 = 12.7 mm (Note: uniform width 21mm, height 32mm)
Commonly used fluorescent lamp length and power: (8w length 341mm; 12w length 443mm; 16w length 487mm; 20w length 534mm;
22w length 734mm; 24w length 874mm; 26w length 1025mm; 28w length 1172mm)
The diameter of the T3.5 tube is (3.5/8) × 25.4 = 11.1 mm
The diameter of the T2 tube is (2/8) × 25.4 = 6.4 mm
Led fluorescent tubes are manufactured according to the specifications of ordinary fluorescent lamps. The specifications are as large as the same. It is convenient to replace the LED fluorescent lamps with ordinary fluorescent lamps without replacing the brackets to achieve environmental protection and energy saving, which is beneficial to save the cost of replacement.
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