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“Electro Luminescent”is called “EL”,EL is a technology which can convert electric to light energy, it include many substance to generate light and called “cold light” as it will not discharge heat during working.
The procedure of cold light: smear phosphorescence substance, unconducted substance(porcelain) and silver(aluminium, copper, black lead and etc) on transparent conducted-film, and add protective cover then a cold light
panel is finished. It will work with inverter and power.

Operation theory: Cold light panel is a device which can convert electric to light energy, and the traditional structure is to put phosphorescence substance into two conducted electrode( one of them can let light go through). Brightness of cold light can be adjusted by voltage or frequency. (Different voltage or frequency range can generat generate different lightness or color)
EL, this kind of light is with following characteristic: light soft, brightness average, high color, high visibility, low power waste, no electric or heat risk and so on.