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About LED lights

Benefits of LED lights

  • Use up to 90% less power than traditional incandescent lighting. A 5 watt LED can give the same light as 50w halogen down light
  • Last up to 50000 hours. Based on 4 hours a day usage this is equivalent almost 35 years
  • Produce almost no heat. If you are running 20 halogen down lights in a room during summer time you will feel the heat coming from them and more than likely put on the air conditioning to cool the house down. With LED you will not feel the heat. Many house fires are caused by the heat coming from traditional Halogen down lights. Have you ever wondered why your down light fitting that was white is now yellow? This is due to the heat coming from the halogen bulb
  • Most low voltage lights contain poisonous Mercury. LED”s do not contain Mercury
  • LED lights come on instantly and do not need time to warm up like fluorescent lights
  • LED lights can be turned on and off without the risk of the bulb failing. Halogen and fluorescent lights fail very fast when turned on and off too many times
  • LED lights are shock resistant. If you drop an LED light it should not be damaged

Superior Efficiency

The key strength of LED lighting is reduced power consumption. When designed properly, an LED circuit will approach 80% efficiency, which means 80% of the electrical energy is converted to light energy. The remaining 20% is lost as heat energy. Compare that with incandescent bulbs which operate at about 20% efficiency (80% of the electrical energy is lost as heat). In real money terms, if a 100 Watt incandescent bulb is used for 1 year, with an electrical cost of 10 cents/kilowatt hour, $88 will be spent on electricity costs. Of the $88 expense, $70 will have been used to heat the room, not light the room. If an 80% efficient LED system had been used, the electricity cost would be $23 per year - there would be a cost savings of $65 on electricity during the year. Realistically the cost savings would be higher as most incandescent light bulbs blow out within a year and require replacements whereas LED light bulbs can be used easily for a decade without burning out.. The use of incandescent lighting has to change.

Is LED lighting more expensive than traditional lighting?

The answer is yes and no. The upfront cost is more expensive but after approx. 1 year you will be saving big dollars on your lighting bills. With Electricity prices always on the rise why would you not change. Also as the life is much longer (up to 35 years) the actual cost of the bulb works out much less in the long run. Think about never having to replace a light bulb again.

Where else are LED lights used?

  • LED lights are used on almost all traffic lights
  • Street Signage
  • Most cars are now coming out with LED lights
  • Factories and commercial buildings are now converting over to LED lights
  • Shopping centres have now started to change to LED lighting
  • All new houses are using LED lighting
  • Under stairs
  • Under kitchen benches
  • Lifts & escalators
  • Almost all the lights used at the Beijing Olympics were LED
  • Neon Lighting is now all becoming LED

About Temperature Dependence

LED performance largely depends on the ambient temperature of the operating environment - or "thermal management" properties. Over-driving an LED in high ambient temperatures may result in overheating the LED package, eventually leading to device failure. An adequate heat sink is needed to maintain long life. This is especially important in automotive, medical, and military uses where devices must operate over a wide range of temperatures, which require low failure rates.

Other Benefits

  • Shock resistance: LEDs, being solid-state components, are difficult to damage with external shock, unlike fluorescent and incandescent bulbs, which are fragile
  • Focus: The solid package of the LED can be designed to focus (optics) its light. Incandescent and fluorescent sources often require an external reflector to collect light and direct it in a usable manner. For larger LED packages total internal reflection (TIR) lenses are often used to the same effect. However, when large quantities of light is needed many light sources are usually deployed, which are difficult to focus or collimate towards the same target
  • On/Off time: LEDs light up very quickly. A typical red indicator LED will achieve full brightness in under a microsecond[100] LEDs used in communications devices can have even faster response times
  • Cycling: 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

Solid-state devices such as LEDs are subject to very limited wear and tear if operated at low currents and at low temperatures. Many of the LEDs made in the 1970s and 1980s are still in service today. Typical lifetimes quoted are 25,000 to 100,000 hours, but heat and current settings can extend or shorten this time significantly.