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In 1909, American scientist Corrich invented tungsten filament as filament, which improved the brightness and life of incandescent lamps. The filament in the glass bulb is heated by electrification, and the filament produces heat radiation and emits light. The lamp cap is the electrical connection and mechanical connection part of the incandescent lamp. lamp holder.
Led downlight
It is often used in basic lighting and decorative lighting in residential buildings, and has the advantages of easy installation, immediate start-up, and low cost. It has a wide operating voltage range, from a few volts provided by the battery to the mains voltage, and is inexpensive and requires no additional circuitry. Its main applications are home lighting and where intensive low operating voltage lamps are required, such as flashlights, console lighting, etc.
Only 10% of the input energy is converted into visible light energy, and typical lifetimes vary from tens to thousands of hours.
