Lighting Technologies

LedLED GENERAL INFORMATION

LED’s began their use, as a Light-Emitting Diode semiconductor light source, in the form of indicator lights for mechanisms. It was thought of as a mere feature in 1962, simply a low-intensity red light.

Currently, they are adapted for use in other lighting formats and manufactured in a variety of colors, including ultraviolet and infrared wavelengths, with amplified intensity and brightness.

HOW THEY WORK

When activated, the light-radiating diode electrons are united with electron holes within the device, and discharge energy as photons. Electroluminescence is the result and the light color is defined by the energy gap of the semiconductor.

WHERE THEY WORK

The compact dimensions, opportunity for a narrow bandwidth, along with their other capabilities, have made them applicable for sensors, text and image displays. LED’s are included as regular features in a variety of venues, functioning as brake lamps, turn signals and indicators, along with traffic signals—in addition to being important to the industry as replacements for aviation lighting. Accelerated switching capability lends itself well in the world of advanced communications technology and their use has expanded to remote control units of many retail products—televisions, DVD players and other domestic appliances. LED interior and exterior lighting has become a major industry. However, those LED’s powerful enough to light a room are comparatively expensive and demand more exact current and heat management than the compact fluorescent fixtures with similar illumination. Frequently small (1 to 2 mm) LED’s and attending optical components are arranged to form an interesting radial pattern.

LED BENEFITS

Offering many improvements above incandescent lighting, LED’s consume less energy, are small, tough, reliable, have accelerated switching, can be used with a dimmer and have a 30-year life span.

What is an incandescent Bulb?

Incandescent lights are the second oldest form of electric lighting. They work by heating an electrical element until it is white hot and can create light. Incandescent lights are an inefficient source of lighting as almost all their energy is converted into heat, and little is converted into light. They also require high power usage and have a low life span. Australia has placed a ban on producing these lights and has restricted imports as well. The only suitable replacements for the incandescent lights are CFLs and LEDs.

 

 

 

 

 

 

 

What is a Halogen Light?

When power is absorbed through a tungsten filament in a bulb filled with halogen gas, it produces a light similar to an incandescent bulb. It is both small and dimmable. The advantage is more light and longer life. However, it is more expensive, is less efficient and gives off a great deal of heat, compelling greater consideration towards the possibility of a fire hazard.

 

 

 

 

 

 

What is a Compact Fluorescent Light (CFL)?

A common name used for small, one-ended fluorescent lights in a folded, bridged, or spiral glass tube with high color emission (CRI > 80) and a long life (> 8,000 hours). Some warnings have been issued for these bulbs, including they use a gas, contain small amounts of mercury and produce a constant humming sound, which can lead to headaches. The immediate disadvantage is the few moments they take to illuminate and have a somewhat yellowish glow until they warm up.