China manufacturer of magnetic ballasts for metal halide flood lights & hps flood lights

Straight tube fluorescent tube diameter size is divided into: T12, T10, T8, T6, T5, T4, T3 and other specifications. Combination of T + number "in the specification, the pipe diameter mm value. Its meaning: a T = 1/8 inches, one inch 25.4mm; figures represent the number of T's. Such as T12 is = 25.4mm * 1/8 * 12 = 38mm.
Fluorescent tube diameter and its electrical parameters of the relationship:
1, fluorescent tubes, the finer diameter, the higher the luminous efficiency, energy-saving effect is better.
2, fluorescent tubes, the finer diameter, starter ignited the higher the voltage, the higher the fluorescent ballast technical performance requirements.
Diameter greater than T8 (or T8) fluorescent tube starter lower ignition voltage. Relative to 220V, 50Hz frequency alternating current line the starter ignition voltage is less than 1/2 power supply voltage law. Inductive ballast, starter ignite the run.
Diameter less than T8 fluorescent tube starter ignition voltage. Relative to 220V, 50Hz frequency alternating current, does not meet the the starter ignition voltage is less than 1/2 the power supply voltage law. fluorescent ballast, starter ignited run. Diameter less than T8 fluorescent tubes, electronic ballasts must match. By electronic ballast, producing the starter high pressure, breakdown fluorescent tubes lit.