Lighting accounts for 15 per cent of a typical household’s electricity bill. You can cut your lighting bill and energy use by changing which bulbs you use and how you use them. Houses typically use a mixture of standard light fittings and downlighters or spotlight fittings. Energy efficient bulbs are available for both types of fittings.
What is an LED?
A Light Emitting Diode is a semi-conductive material that produced light via Electroluminescence. This is an optical and electrical phenomenon in which light is emitted from a material when an electrical current or strong electrical field is passed through it.
The invention and development of the high-power white-light LED used in luminaires is rapidly replacing incandescent and fluorescent lighting. The development of LED technology has caused their efficiency and light output to rise exponentially, with a doubling occurring approximately every 36 months since the 1960s.
Advantages of LEDs?
1. LOW RUNNING COSTS
LEDs are far more efficient at converting electricity into light than alternative light sources. In LEDs, typically 80% – 90% of the electricity is converted into light whereas traditional incandescent lamps only turn around 50% of their electricity into light.
This means you use less power to achieve the same amount of light. An example of how they typically compare is shown below:
|Lamp||Wattage||Lamp lumens||Luminaire VLED Wattage||Lumens|
||50w||450lm||Downlight = 7w||552lm|
|Low Voltage Dichroic
|50w||850lm||Downlight = 10w||895lm|
|18w||1200lm (850lm*)||Downlight = 10w||895lm|
|Downlight = 30w||2650lm|
|Downlight = 30w||2650lm|
2. LONG LIFE
Almost all LED luminaire manufacturers quote a life of 50,000 hours for an LED, but they will also normally show L80 after that figure.This relates to the life, so L80 means that at 50,000 hours, you will still have 80% of the light from the LED that you have on day one.
At 12 hours a day 365 days a year, the LED would last around 11.5 years.
To put this in context, a now outlawed Tungsten Candle lamp would give 1000 hour life, a low voltage lamp would typically give 5000 hour life, a Metal halide discharge lamp would give 12,000 hour life and a T5 Fluorescent up to around 20000 hour life.
3. NO HEAT OR UV LIGHT
Incandescent uses 50% of its energy in the infrared/heat range which can’t be seen by the eye. In LED’s, 100% of the light produced is within our eyesight range of 400-700nm.
4. EARTH FRIENDLY
Unlike fluorescent lights that can contain a lot of different chemicals including mercury, LEDs are free of toxic chemicals and are 100% recyclable.
5. INSTANT LIGHT
Unlike other lamps such as compact fluorescent which take time to warm up to full brightness, LEDs are 100% instantaneous. This makes them perfect for use with switch types such as PIR and occupancy sensors.
• Available in different colour temperatures – extremely warm white to daylight (2400k-6000k)
• Available in different sizes.
• Robust – if you drop one it will still work afterwards.
• Work well in different temperatures
• Fully dimmable
What about the phase out of inefficient light bulbs?
All traditional incandescent bulbs have been banned within the EU, as part of a shift towards more efficient technology with other lower performing halogens expected to be phased out from September 2018. An increase in efficiency and decrease in the cost of LED bulbs over the last few years has helped ease this transition.
SEE WHAT ON AVERAGE YOU COULD BE SAVING YEARLY BY INSTALLING LED – http://www.energysavinglighting.org/LED-Calculator