Guang Zhou Wama Lighting Technology Co.,LTD

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Tel: +86-020-29120238
Fax: +86-020-29120239
Add: No 66, Xiaoping Industry Zone, Shijing Town, Baiyun District, Guangzhou, Guangdong, China


Question: What does LED stand for?

        LED stands for “Light Emitting Diode”. Light Emitting Diodes, as the name states - are diodes. A diode is a semi-conductor device that permits current flow in one direction. Semiconductor diodes are a junction of two materials. One material has a surplus of positive charge (holes), and the other a surplus of negative charge (electrons). When one applies a forward voltage, the electrons and holes are brought together. They combine and release light energy - the ’light emitting’ part of the name.

Question:Is an LED a bulb?

        LEDs do appear to be bulbs, but in fact are not. LEDs are tiny semiconductors encapsulated in plastic which protects their components and helps to focus the light.

Question:What is the difference between an incandescent bulb and LED?

        Incandescent creates light by the use of a filament. When power is applied, the filament glows and generates heat - which in turn produces light. LEDs are just the opposite. LEDs create light through a ’cold process’. When power is applied to semiconductors (usually gallium, asenic and phosphorous), they’re stimulated by the movement of electrons, this creating photons. Photons are the light that is visibly seen by humans.

Question:Do LEDs have a wire filament?

        No, LEDs operate using entirely different components. LEDs are diodes - they only allow power to move in one direction. The anode (+) is where the current comes in and the cathode (-) is where the current goes out, much like the positive and negative terminals of a battery. Incandescent bulbs project light in every direction (omni-directional) as opposed to LED lights which project light in specified directions (such as 20, 50 and 120 degrees) due to their package design and layout.