Frequently Asked Questions - Lighting
What is an LED?
LED stands for Light Emitting Diode. LED's are a solid-state light source device that converts electric energy directly into light, a phosphor is usually incorporated to convert UV light to visible light.
Why are LED Bulbs more expensive than standard bulbs?
Like all new technology, when it is initially launched there is a premium to pay as the volumes are not there to begin with, as the demand increases the price naturally reduces due to the economies of scale. When you look at the price of the LED compared to the old fashioned light bulbs you need to take into consideration the cost of running the lamp and the life of the lamp. Most LEDs are offering a life span of upto 50,000 hours compared to 1,000 -2,500 hours for the standard incandescent lamps therefore you would need to replace your conventional bulb a minimum of 20 times . The cost of running the LED lamp is far cheaper, the equivalent 50w halogen lamp in LED is 5w which means its 10 times as expensive to run the old technology lamps. However in 2019 the price of LED's has now reduced on average by a massive 80% making them even more affordable to a wider audience.
Why buy Light Emitting Diodes?
Here are a few reasons that you might want to install LED's:
You can save approximately 80% in energy when compared to the standard incandescent light bulb.
You can even save 75% in energy when compared to halogen light bulbs.
LED's are environmentally friendly, they don't contain any hazardous solids, gases or liquids which are found in sodium lamps, mercury lamps and metal halide lamps.
LED's do not omit any harmful UV rays of light, unlike many high wattage discharge lamps.
LED's are easy to install as they are a direct retrofit in most cases.
Reduced maintenance costs - you wont need to replace them anywhere near as many times when compared to the old incandescent technology, having a rated Life of 50,000 in many cases compared to 1,000 hrs in many incandescent light bulbs.
The LED's burn cool unlike the halogen and discharge bulbs which can give you a nasty burn if you touch them when in use.
Do LED Light Bulbs take long to switch on?
LED's illuminate as soon as the power is switched on unlike discharge lamps which can take up to 2 to 3 minutes to come up to full brightness, giving the LED's the edge not only with energy saving but also health and safety and security as LED's come up to full brightness immediately.
Will LED Light Bulbs fit my old light fitting?
In most cases there is an LED direct retrofit solution for the old technology bulbs, offering the same cap (base eg SES, BC, ES), colour temperature (3000k, 4000k, 5000k or 6000k) low wattage equivalent ( 5w LED = 50w halogen) and lumens (light output).
Do LED Light Bulbs give the same brightness?
LED Light Bulbs are available in various different colour temperatures ranging from 3,000k to 6,500k. The brighter the colour you require the higher the colour temperature, for example if want a very bright light you might prefer the 5,000k or 6,500k, however if you prefer the warmer colour appearance you might look at the 3,000k.
Can I use LED Light Bulbs with a dimmer switch?
LED incandescent replacement light bulbs are available in dimmable versions and designs such as candle, GLS, rounds to name just a few.
How do LED Lamps use less power?
Incandescent light bulbs emit light by heating a resistive filament of tungsten to very high temperatures approximately 3000 degrees C.They glow white hot and the light comes from the visible light spectrum emissions of the hot filament. But in terms of energy only 2% of the electric power used is emitted as light energy. The remainder is heat in the infrared portion of the emissions spectrum. LED's make light by a completely different process to that of standard incandescent light bulbs. The Light from an LED is emitted by a semiconductor junction, there’s still heat produced, however a much larger fraction of energy goes to making light energy. Typically a 9 W LED bulb makes as much light as a 60 or 75 Watt incandescent bulb.
What are lumens (lm)?
Lumens are a measurement of visible light. The higher the lumen rating the “brighter” the lamp will appear.
What is Colour Temperature (CCT or correlated colour temperature)?
This is a means of expressing the general colour of a light source. The higher CCT indicates the whiter or bluish the light source. The lower the CCT indicates the yellower the light source Commonly known as colour temperature and expressed in degrees kelvin.
Can I use Light Emitting Diode Lamps for my retail shop?
LED Light Bulbs are suitable for most applications such as shops, warehouses, domestic households, offices almost anywhere where you have existing lighting (tube lights, spot lights, strip lights etc) or you want to upgrade using new LED fittings to save money.
Why are LED Lights considered green technology?
Light Emitting Diodes are considered GREEN (environmentally friendly) for many reasons. LED Lights contain no mercury or sodium unlike High Intensity Discharge (HID) lamps. Also, LEDs are compliant with the Restriction of Hazardous Substances. They are designed to last for more than ten years which means maintenance free, which also means less waste since you do not have to replace the bulb.
Are LED Light Bulbs waterproof?
Not all LED Light Bulbs are waterproof, you need to check to see if they have an IP rating (ingress protection) the higher the IP rating the better the protection against accidental ingress of dust or water, for example IP20 is non protected, IP66 denotes its dust tight and protected from strong water jets.