Most people are familiar with the tiny LED light bulbs that have for many years been used to illuminate control panels and are now pervasive in battery torches and decorative lighting. However LED technology has been advancing at such a rapid pace that over just the last few years LED light bulbs have started to appear that offer a highly cost effective alternative to general lighting.
Over the years there has been an exponential increase in the power available from white LED lights while at the same time the production costs have steadily dropped, with the result that LED lamps suitable for general public and domestic use are now a reality.
A crucial feature of LED lighting for many people is their power consumption and longevity. When compared with conventional incandescent light bulbs, LED lights require 10 times less electricity and the bulbs themselves last up to 20 times longer. Also they are very fast to start up, exhibit superb light quality, and don’t contain poisonous mercury – in stark contrast to the current breed of CFL based energy saving lamps.
It’s not all roses and sunshine though; LED light might be extremely bright but it also typically highly directional. This means that while a regular incandescent light bulb will emit light (and considerable amounts of heat) uniformly, an LED will create a narrow, focussed beam that casts a narrow light pool.
This particular quality means that they are ideally suited as spotlights, though unlike a regular spot lamp where reflectors attempt to direct the light in one direction, an LED spotlight actually needs multiple individual elements arranged in a cluster so as to spread the light out a bit.
Presently, the most common use for LED light bulbs in a domestic setting is replacing MR16 and GU10 base halogen lamps. Halogen lighting costs easily ten times more to run than LED equivalents since a 4W MR16 LED bulb is capable of delivering the same level of light as a 35w halogen.
Because the components required for an LED are quite small it also means that these replacement spot lights can be made to exactly the same dimensions as the lamps they are replacing. They will also last a long time and not wear out at the same rapid rate of many halogen lamps; they don’t generate vast amounts of heat and most importantly don’t burn (quite literally) money when in use.
However, there are a few issues worth noting when considering using LED light bulbs as replacements for halogen lamps. For a start most LED lights are not suitable for dimming and in general you are likely to have to provide transformers and dimmers specially designed for LED. Then there is the business of colour temperature. LED lights typically vary between what are described as warm white and cool white; in general most conventional incandescent lights are in the warm range and exhibit appear slightly yellow.
Finally, LED light bulbs are still slightly underpowered and overly directional by comparison with incandescent lighting and the best way to compensate for this is to simply install slightly more light bulbs in order to increase overall luminosity and create a better spread of light.
If you found this article interesting then you’ll also want find out more about domestic LED lighting in general and warm white MR16 LED replacement in particular.
