Ordinary fluorescent lamps are long a straight tube, fluorescent lamp structure and working principle: both ends of a filament in the fluorescent lamp, lamps filled with argon and the thin trace of mercury vapor, and fluorescent tubes inner wall is also coated with phosphor, conductive gas between the two filament issued when UV, visible light to a soft phosphor. General principle is the ultraviolet fluorescent light-emitting phosphors excited.
Ordinary fluorescent features: an instant when the lamp ignited the beginning of high voltage, when the fluorescent lamp has been lit by normal light, only to allow small currents, when the voltage across the fluorescent tube below the supply voltage.
Fluorescent tubes are installed at both ends of the filament used to produce ultraviolet light, glass wall coated with a thin uniform layer of phosphor, a vacuum tube and then pumped into a small amount of mercury into the future, filled a small amount of inert gas, and also into the trace liquid mercury. General fluorescent tube and a magnetic ballast, which is a core coil, when the coil current changes, flux in the coil will cause the change, resulting in induced electromotive force, inductance coil the direction of electromotive force and the current in the opposite direction, impeding effect of current changes to maintain a constant current.
Fluorescent tube starter switch from the role in the circuit, it has two main components neon gas discharge and capacitance, capacitance to eliminate the power of electromagnetic interference and the formation of oscillation loop with ballast to increase the start of the magnitude . A discharge tube with a pair of metal electrodes, which uses the neon bulb discharge heating, double metal sheets in the opening and closing, the current mutation causing magnetic ballast and generates high voltage pulses added to the tube ends, under the effect of the high voltage pulse fluorescent tube will start to issue the two ends of the filament lamp UV-excited phosphors.
When the fluorescent lamp access circuit after the starter began to glow discharge between two electrodes, two metal pieces began to expand due to heat most contacts with the static contact, so power supply, ballast, and starter filament form a closed circuit, Start by preheating the filament power, when the heating time of 1-3 seconds, the splendor of the glow discharge between two electrodes out, along with dual-metal static contact cooling very disconnected, disconnected when the two electrodes moment, due to the current circuit in the sudden disappearance of the ballast to produce a high voltage pulse, it ah, and then overlapped with the power, and then added to the ends of fluorescent tubes, so ionized inert gas inside the tube caused by arc discharge, in normal light during the self-inductance also plays a stabilizing ballast circuit currents.
High Power LED Fluorescent Lamp
Made of high-power LED fluorescent tube, the appearance and structure of the same ordinary fluorescent tube, but within the different high-power LED fluorescent tube, LED fluorescent tube used in the semiconductor solid-state light-emitting devices --- High-power LED light-emitting diodes
Advantages of LED fluorescent
LED fluorescent lamps are long life, high efficiency, energy saving characteristics, high power LED projection angle adjustment range, 15W brightness equivalent to ordinary 40W fluorescent lamp. High temperature, humidity, water, leakage power. Use voltage: 110V, 220V optional, jacket optional glass or PC material. Like ordinary fluorescent lamp.
led fluorescent lamp light source using the latest LED technology, digital design, saving more than 70%, 12W of LED fluorescent light intensity equivalent to 40W of fluorescent tubes (used for ballast and starter, 36W fluorescent real power for the 42W to 44W). LED fluorescent lamp life of more than 10 times normal, almost maintenance-free, no need to frequently replace the lamp, ballast, starter. Green semiconductor light source, soft light, spectrum of pure, beneficial to the user's eyesight protection and health. 6000K cold light source gives the feeling of cool visual, user-friendly design of illumination differences, but also help to focus and improve efficiency. Is truly green lighting.
LED fluorescent shortcomings
As the fluorescent light tube is a light source, while the brightness single LED light enough, so I generally use the dot matrix LED fluorescent tube light emitting mode, so one bad heat problem to solve two point light source is prone to visual fatigue, there are now LED fluorescent brightness than ordinary fluorescent or not enough.
Keywords: fluorescent lamp, led fluorescent lamp, general fluorescent