According to the size of the pipe diameter (1) Straight tube type fluorescent tubes are divided into: T12, T10, T8, T6, T5, T4, T3 and other specifications according to the diameter of the tube. The "T + number" combination in the specification indicates the millimeter value of the pipe diameter. Its meaning: one T = 1 / 8 inches, one inch is 25.4mm; the number represents the number of T. For example, T12=25.4mm*1/8*12=38mm. (2) The relationship between the diameter of the fluorescent tube and its electrical parameters: 1. Fluorescent tube, the thinner the tube diameter, the higher the light efficiency, the better the power saving effect. 2. Fluorescent tube, the thinner the tube diameter, the higher the ignition voltage of Qihui, the higher the technical performance requirements of the ballast. Fluorescent tubes with a diameter greater than T8 (including T8) have a lower ignition voltage. Compared with 220V, 50Hz power frequency AC, it is consistent with the ignition voltage of Qihui is less than 1/2 of the power supply voltage law. An inductive ballast can be used for the ignition operation. For fluorescent tubes with a diameter less than T8, the ignition voltage is higher. Compared with 220V, 50Hz power frequency AC, it does not meet the law that the ignition voltage is less than 1/2 of the power supply voltage. Inductive ballasts cannot be used for ignition operation. Fluorescent tubes with a diameter less than T8 must match the electronic ballast. The electronic ballast generates an ignition high voltage and ignites the fluorescent tube. Thereafter, the electronic ballast is driven to drive the fluorescent tube to ignite. By color (1) Straight-tube type fluorescent tubes are divided into three colors: a fluorescent lamp with three primary colors, a fluorescent tube with a cool white daylight, and a fluorescent tube with a warm white daylight color. (2) The relationship between the color of fluorescent tubes and their technical quality: The phosphors coated with fluorescent tubes differ from the type of gas they are filled in, and the fluorescent tubes exhibit different light colors. The technical quality is also very different. 1. The fluorescent tube is coated with halogen phosphor, filled with argon gas and helium-argon mixed gas. The color of the fluorescent tube is: cool white daylight fluorescent tube, warm white daylight fluorescent tube. These two color fluorescent tubes have low color rendering performance and a color rendering index R value of less than 40. Far less than the sun, the color rendering index R = 100 standard value. View the color of the surface of a colored object and produce a color shift. The color is greenish and grayish, and the color is dim and not bright. These two color fluorescent tubes have relatively low luminous efficiency. The luminous efficacy is generally 30 electric lumens per minute (Lm) to 40 (Lm). These two kinds of light-colored fluorescent tubes contain more invisible light in the spectrum, and the effective pupil dilation (effective visual light effect) is also relatively low. The effective light efficiency is low and the effective illumination is low. These two kinds of light-colored fluorescent tubes and fluorescent tubes have a relatively short ignition life, generally ranging from 5,000 hours to 6,000 hours. The above two kinds of fluorescent tubes of light color are not high-efficiency energy-saving electric light sources and do not meet the requirements of green lighting technology. 2. The fluorescent tube is coated with three primary color rare earth phosphors and filled with high-efficiency luminescent gas. The fluorescent tube color is a high color rendering solar color synthesized by three primary colors. It is similar to the color of the Promise. The trichromatic rare earth fluorescent fluorescent tube has a color rendering index R value of more than 80 and is close to the solar color (the color rendering index of sunlight is R=100). The trichromatic rare earth fluorescent fluorescent tube has a relatively high luminous efficiency, and the luminous efficiency is generally 65 lumens per watt (Lm). The actual luminous efficacy of the fluorescent tube is directly related to the technical characteristics of the ballast used and the matching degree of the ballast and the fluorescent tube. Now there is information on the Internet that the fluorescent light effect of the straight tube can be more than 100 lumens. Tri-color rare earth phosphors (LVD electrodeless lamps also use such phosphors) fluorescent tubes, Qi Hui ignition life is also relatively long, generally more than 8000 hours. For example, high-performance electronic ballasts with advanced technology performance will increase the ignition life to 15,000 hours - 20,000 hours.
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