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June 28, 2009

An Introduction To LED Kitchen Lighting

Great kitchen lighting design typically utilises a large amount of lighting (which means more than just installing a few extra ceiling roses). Kitchen lighting needs a variety of types of lighting for different areas and purposes. The absolutely worst way to illuminate a kitchen is using bright fluorescent ceiling strip lights. They're certainly very bright - but also flat, cold and guaranteed to give you a headache into the bargain.

The most obvious issue with having central ceiling-rose fittings in a kitchen is that they produce dark spots, most noticeably where you cast your own shadow onto work surfaces. A solution seen in many kitchens involves fitting halogen down lamps in a uniform pattern across the ceiling then adding task-specific lighting for workareas, hobs and so on.

This solution works reasonably well, but does have its own downsides: halogen lamps operate at extremely high temperatures, don't last very long, and are without rival as the most expensive means of lighting a kitchen. Some 90% of the cost of incandescent lighting (of which halogen is an extreme example) is the electricity they use.

This one fact helps explain the growing popularity of cool, super energy efficient LED kitchen lights. For mains powered lighting you simply replace all existing GU10 halogen lamps with equivalent GU10 LED lights. For low voltage systems, you first replace existing 12 volt transformers with a smaller number of constant voltage 12 volt LED drivers (each can power a number of light fittings) then replace MR16 halogens with LED light bulbs.

When installing LED spotlights there are 3 main areas to bear in mind, these being: brightness (or luminosity); colour temperature (whether the light appears cool and blue or warm and yellow); and beam angle (tightly focused or widely dispersed). It's a good idea to get as close as possible on these three areas to the qualities of the halogen lamps you're replacing.

It has become the norm to measure brightness according to wattage, but the wattage ratings for LED light bulbs are approximately 10% compared to normal incandescent or halogen bulbs of the same brightness. Accordingly you should look to replace a 35w halogen lamp with 3-4w LED and a 50w with probably a 5w LED.

Color temperature is used to measure how warm or cool a light seems. LED lights are available in a variety of white color temperatures (and also, colors) but since it has always been easier to manufacture blue LEDs, many cheap LEDs tend to have a cold/bluish tinge. Go for warm white (color temperatures below 3500K) for a reasonable approximation to the kind of white light normally associated with halogen lamps.

A narrow beam angle, say 45 degrees, makes any light appear tighter and more contained to a defined spot, whereas a much wider 120 degrees spreads the light out evenly, eliminating glare and "hot-spots". Quite possibly the best LED spot light currently available that acts as a straightforward halogen replacement is the Sharp Zenigata.

A critical component that determines how artificial light actually appears is not the light itself but the surface on which it is shining. To create a warm feel simply direct spot lights at warmly coloured areas (clay tiles, wood or just a wall painted in warm colours). If a dramatic effect is what you're after, try shining blue LEDs at either dark or reflective surfaces - blue LED light bounced off granite or steel can appear stunning.

Combine LED lights of varying characteristics with different textures and colours to produce a range of effects suited to individual zones in your kitchen. The are almost boundless possibilities, even before you get to playing with LED strip lighting to accent plinths, worktops, coving and more or less anything else that takes your fancy. As ever though, the best designs often emerge by limiting things to a handful or less of the most appealing ideas - but don't be surprised how stunning even small amount of LED kitchen lighting looks.

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Filed under Interior Design by Abigail Monot

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