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Natural light: Installation of roof lights, large windows and an open plan layout inside, all help to maximise natural light levels in your home and therefore reduce the need for artificial lighting.

Lightbulbs: These account for a fifth of the average domestic electricity bill,so switching off lights when not in use (if the room is going to be empty for over 15 minutes) really does make a difference. The other If you use traditional (incandescent) lightbulbs, only 10% of the electricity used is converted into light, and the rest is given off as heat. Low energy, or Compact fluorescent lamps (CFLs) are far more efficient at making light from electricity, and a 20W CFL can replace a 100W incandescent, so you can quickly make up for the purchase price. Low energy bulbs also last much longer, and are now available in many varieties including dimmable types and spotlight or downlighter fittings. LED (light-emitting diode) bulbs are generally too dim for domestic spotlights (at 1 or 2 watts), but there are now 10W LEDs to replace 30W halogen bulbs.

Lighting plan: Consider where you place your light fittings. Concentrate on areas where lighting is needed most, and minimise lights in areas such as halls and bedrooms. Keeping lights wired separately will allow greater control over the amount of illumination. Don’t forget, choosing white or pale paint for your walls and ceiling will naturally reflect the light. Low energy lightbulbs and dimmer switches will also reduce your electricity bills.