LED Lighting


LED Lighting:  Decoration / Illumination LED Bulbs, LED Bulbs and Fixtures

NO IMAGE Light-Emitting Diode (LED)

A Light-Emitting Diode (LED) is a semiconductor light source. LEDs are used as indicator lamps in many devices and are increasingly used for other lighting. They were introduced as a practical electronic component in 1962. Early LEDs emitted low-intensity red light, but modern versions are available across the visible, ultraviolet and infrared wavelengths, with very high brightness.

Types of LEDs

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LEDs are produced in a variety of shapes and sizes. The 5 mm cylindrical package (red, fifth from the left) is the most common, estimated at 80% of world production. The color of the plastic lens is often the same as the actual color of light emitted, but not always. For instance, purple plastic is often used for infrared LEDs, and most blue devices have clear housings.

Characteristics of LED Lighting

1.  Efficiency: LEDs emit more light per watt than incandescent light bulbs. Their efficiency is not affected by shape and size, unlike fluorescent light bulbs or tubes.

2.  Color:

LEDs can emit light of an intended color without using any color filters as traditional lighting methods need. This is more efficient and can lower initial costs.

3.  Size:

"LEDs can be very small (smaller than 2 mm) and are easily populated onto printed circuit boards. "

4.  On/Off time:

LEDs light up very quickly. A typical red indicator LED will achieve full brightness in under a microsecond. LEDs used in communications devices can have even faster response times.

5.  Dimming:

LEDs are ideal for uses subject to frequent on-off cycling, unlike fluorescent lamps that fail faster when cycled often, or HID lamps that require a long time before restarting.

6.  Cool Light:

LEDs can very easily be dimmed either by pulse-width modulation or lowering the forward current.

7.  Color:

In contrast to most light sources, LEDs radiate very little heat in the form of IR that can cause damage to sensitive objects or fabrics. Wasted energy is dispersed as heat through the base of the LED.

8.  Slow Failure:

LEDs mostly fail by dimming over time, rather than the abrupt failure of incandescent bulbs.

9.  Lifetime:

LEDs can have a relatively long useful life. One report estimates 35,000 to 50,000 hours of useful life, though time to complete failure may be longer. Fluorescent tubes typically are rated at about 10,000 to 15,000 hours, depending partly on the conditions of use, and incandescent light bulbs at 1,000–2,000 hours.

10.  Shock Resistance:

LEDs are difficult to damage with external shock, unlike fluorescent and incandescent bulbs which are fragile as they are solid state components.

11.  Focus:

The solid package of the LED can be designed to focus its light. Incandescent and fluorescent sources often require an external reflector to collect light and direct it in a usable manner.

LED Applications

1.  Living Room:

Lamps for tables,floor,and ceiling.
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2.  Bedroom:

Lamps for walls, bedside, and ceiling as well as crystal lamps.
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3.   Kitchen:

Wall lamps, ceiling lamps, recessed lamps in cabinet, table lamps, etc.
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4.  Washroom:

Lamps for mirrors, walls, and ceiling etc.
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5.  Office:

Office and park lighting etc.
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6.  Shopping Mall:

Accent and general lighting etc.
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7.  Art Gallery:

Accent lighting etc.
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8.   Hospitality:

Accent, general, and scene lighting etc.
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Decorative Lighting

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