Why Buy LEDs?
LED’S or Light Emitting Diodes are highly energy efficient. They have a long life-lasting up to 50 times longer than incandescent lamps and 2 to 5 times longer than fluorescent lamps. They are not effected by regular on-off switching, which is good for areas such as kitchens and bathrooms. In addition, they are at full brightness as soon as they are switched on and many are fully dimmable.
How do LEDs work?
LEDS are a type of solid-state lighting (SSL). They are a type of semiconductor that causes electrons to release energy in the form of photons or light. The colour emitted depends on the materials used to make the LED. They can be red, yellow, blue, green or white.
Benefits of LEDs?
- Up to an 85% saving on your electric lighting costs
- LED’s are now brighter lumens and lux than 50 watt halogen downlights
- Low heat emission: LED bulbs and downlights radiate very little heat ( 60 to 65 Degrees) while halogen downlights emit heat up to 300 degrees. Using LED lighting instead of halogen means upto a 75% decrease in generated heat
- Fewer light changes: LED downlights last up to 10 times longer than halogen. They have a life span of between 30,000 to 50,000 hours, while for halogen downlights, the average is around 3000 hours, Incandescents have a life span of 1000 hours
- Softer on the eye: Instant start up and flicker free (fluros)
- Trouble free re-fit: Generally easy to retrofit when there are existing halogen downlights in place
- Low Toxicity: LED Downlights contain no mecury, unlike fluorescent and compact fluorescents
- Zero Radiation: No UV or IR radiation when compared to halogen downlights
- Saves costs and saves the environment: With a carbon foot print of up to 11 times less than 50 watt halogen lamps, LED’s have a positive impact on the environment
The simple way to calculate costs of consumption of electricity per month would be:
Cost of electricity per KWH x Watts consumed devided by 1000 x hours used per day x 30 days x number of lamps in use
Average consumption cost of electricity of South Australia = 0.25 kWh (source sa.gov.au)
A 9W LED downlight being run for 8 hours a day
Month = 30 days
Number of Lamps = 6
= 0.25 cents per kWh x 9W divided 1000 x 8hrs x 30 days x6 lamps = 3.24 cents per month
By Comparision a halogen downlight would cost a consumer:
=0.25 cents per kWh x 65W divided by 1000 x 8hrs x 30 days x 6 lamps = 23.40 cents per month
Important terminology when selecting LED’s
LUMENS: A measure of light output. The higher the number, the more light is emitted. For an LED lamp to provide equivalent light to the common 50 Watt halogen downlight, it must produce a minimum light output of 480 lumens.
ENERGY EFFICIENCY: The energy efficiency of a light is measured in lumens per watt. A good quality LED should emit at least 50 LM/W.
COLOUR TEMPERATURE: LED’s produce white light in a number of shades, just like fluorescent lamps. These range from warm white to cool white or bluish white (daylight). Be sure to choose the colour you are most comfortable with.
COLOUR RENDERING INDEX: The ability to render colour. Some LED’s lamps are better at helping the human eye see colours than others. Look for lamps that have a colour rendering index (CRI) of at least 80 for indoor use, or at least 65 for outdoor use.
All information above is per the Lighting Council of Australia www.lightingcouncil.com.au and E-Lite Australasia Pty Ltd.
D-STAL Electrical can find out which LED lights best suit your home or office.
We can also supply you with the latest in LED Lighting solutions as well as install them for you.