About LEDs

General LED Knowledge

 

  • Energy Efficiency – Why pay for electricity you do not see in your lighting system? LED lights burn very cool, white Incandescent bulbs emit 98% of their energy as heat. Though currently more expensive to purchase up front, LED lighting will save in long-term operational costs. Much more bang for the buck. Meet the new standards set forth by ASHARE and others using a low wattage solid-state system. LED points are easily achievable when lighting your facility with an LED lighting system outdoors. Directionality and usable lumens make it the perfect choice.
  • Long Life – LED lights can last up to 100,000 hours. Incandescent lamps have a life span of 1000 to 2000 hours. Fluorescent and HID have a life span of 10,000 to 20,000 hours. (*) Notice the difference between the definitions of L70 Lifespan for LEDs and that of Average Lifetime for traditional Lighting.
  • Rugged Durability – LEDs have no fragile filament to contend with and no fragile tube. They are resistant to heat, cold and shock. Solid state in nature, LED lighting is far more durable than any other type of lighting. No filaments, gases or thin glass ensures facilities a ton of saving in breakage and shorter lamp life sure to ambient forces such as wind, vibration, movement and human error.
  • Shock Resistant – Unlike typical conventional light sources, LEDs are not subject to sudden failure or burnout as there are no filaments to burn out of break. In LEDs, the light emits from fully encapsulated silicon diodes immersed in a phosphor which can be energized from a very low voltage input.
  • Lumens Per Watt (LPW) – While manufacturers are still finding new ways to increase this ratio, they have been able to produce an LED that generates 160 lumens/watt. This is initial though today’s available LEDs are averaging 50 to 100 lumens.
  • Eco-friendly Technology Reduces Carbon Emissions – Unlike incandescent, fluorescent or HID light bulbs, the LED lights are environmentally safe and ecologically friendly. There are no poisonous elements used in component manufacturing, such as mercury or other noxious and polluting gases or substances (carbon dioxide, sulfur oxide). LED lighting reduces pollution as they don’t leach harmful poisons into the earth or atmosphere. LED lighting is 100% recyclable so they never end up in a landfill. With traditional lighting there are special disposal costs to take into consideration also.
  • Compatibility – LED lighting is compatible with most systems. Some models are screw in replacing incandescent bulbs. Others can replace halogen bulbs, fluorescent tubes or high intensity discharge (HID) lamps.
  • Unparalleled Maintenance Savings – When determining lighting upgrade, the maintenance saving is a major factor in return on investment. Although important, many financial analysis overlook this factor altogether. Total system and total cost must be considered. The typical total life of 50,000 hours per unit with minimal degradation of light output eliminates the cost of periodic re-lamping and regular maintenance. LED units are also tamper/vandal proof.
  • Control Options – LED lighting systems can be used in conjunction with occupancy sensors and other lighting controls like dimmers, daylight controls and intelligent computer based programs. This has the potential to increase the life of your lighting system exponentially.
  • Eliminating Light Pollution – Light Pollution is virtually eliminated as light output from LEDs is directional, directing light where it is required. This is highly efficient as no light is wasted when compared to conventional lighting where light is typically Omni-directional from bulbs or tubes. Beams are available from 2° to 135° for specific light guidance from light source. Directionality is an important feature of LED lighting. Put the light where you need it. Why incur lighting cost for light that you are not using?

WHY LED LIGHTING?

19 percent of the energy consumption worldwide is used for lighting. Keeping in mind that most of this energy is converted not into light but into heat.

LEDs differ from traditional light sources in the way they produce light. In an incandescent lamp, a tungsten filament is heated by electric current until it glows or emits light. In a fluorescent lamp, an electric arc excites mercury atoms, which emit ultraviolet (UV) radiation. After striking the phosphor coating on the inside of glass tubes, the UV radiation is converted and emitted as visible light.

An LED, in contrast, is a semiconductor diode. It consists of a chip of semi-conducting material treated to create a structure called a p-n (positive-negative) junction. When connected to a power source, current flows from the p-side or anode to the n-side, or cathode, but not in the reverse direction. Charge-carriers (electrons and electron holes) flow into the junction from electrodes. When an electron meets a hole, it falls into a lower energy level, and release energy in the form of a photon (light).

 

Unique LED characteristics:

Directional light emission – directing light where it is needed.

Size advantage – can be very compact and low-profile.

Cool temperature operation – performance improves in the cold.

Instant on – require no “warm up” time.

Rapid cycling capability – lifetime not affected by frequent switching.

Controllability – compatible with electronic controls to change light levels and colour characteristics.

No IR or UV emissions – LEDs intended for lighting do not emit infrared or ultraviolet radiations.

(Source: U.S. Department of Energy – Solid State Lighting)

The LED bulb, built based on the most advanced LED technology today, presents the best and the most obvious choice for the replacement of CFL and incandescent light bulbs. The incandescent & Fluorescent bulb will be obsolete in 10 years. The rapid adoption of this innovative LED lighting technology is the perfect solution.

  • Long lifetime: 25 years (based on 4 hours average use per day).
  • Eco-friendly
  • Recyclable
  • Has no UV radiation
  • Do not produce hazardous waste

The Pharox create the perfect lighting atmosphere, ideal as general lighting for home and commercial application.

The End of Incandescent
Australia was the first country to announce an outright ban on incandescent light bulbs by 2010.

European Union Energy Ministers decided inLuxembourg recently to ban incandescent light bulbs inEurope as of 2010.
In theUnited States it is not mandated to begin until 2012 and phased out through 2014. The phase-out of incandescent light is to begin with the 100-watt bulb in 2012 and end in 2014 with the 40-watt.
Energy bill passed by Congress and signed by President Bush sets energy-efficiency standards for light bulbs that traditional incandescent bulbs can not meet. All light bulbs must use 25 percent to 30 percent less 2014. By 2020, bulbs must be 70 percent more efficient that they are today.

While CFLs arguably use less energy and last longer than incandescent, there is one serious environmental drawback – the presence of small amounts of highly toxic mercury in each and every bulb. This poses problems for consumers when breakage occurs and for disposal when bulbs eventually do burn out. Most consumers, even those already using the CFLs, do not realize the long-term dangers the bulbs pose to the environment and the health of human beings.

Though the amount of mercury in each bulb is small – about 4 milligrams – the potential environmental hazard created by the mass introduction of billions of CFLs with few disposal sites and a public unfamiliar with the risks is great.

When sufficient mercury accumulates in a landfill, it can be emitted into the air and water in the form of vaporous methyl-mercury. From there, it can easily get into the food chain.