Changing to low energy lighting is the second most cost-effective way to improve energy efficiency after insulation. A significant proportion of the buildings electricity consumption will be used by lighting. The following principles apply for reducing the energy use of lighting:

• Keep windows clean to make the most of natural lighting.

• Low energy bulbs can be bought for many fittings and include the more common pear shaped and candle shaped bulbs.

• 50W halogen spotlights can be replaced with 9W compact fluorescent GU10’s that fit into the recessed light fittings, saving 80% on energy.

• If spotlights are on a 12V circuit then 10W or 20W dichroic MR16’s can be used to replace 35W or 50W spotlights.

• L.E.D. lights use very little energy to run and have a contemporary feel. 1W or 2W LED GU10 spotlights can be used to replace 50W halogens in areas that already have ambient lighting.

• Although fluorescent tubes are relatively energy efficient, new T5 15mm tubes (106 Lumen/W) are 50% more efficient than older 38mm T12’s (55Lumen/W). They can be replaced without changing the fittings in many cases. Using high frequency ballast and reflector units also increases the efficiency of the units.

• We recommend the use of light or movement sensitive switches (such as PIR sensors) in areas where lights are used occasionally such as toilets hallways, and external areas.

• Dimmer switches can be used to save energy in areas that require a variable amount of lighting.

• In areas that have no natural light, consider the use of daylight tubes in the ceiling. This will provide free, natural daylight during the day.

• External lighting should be fitted with shades to reduce light pollution. Low wattage lights for pathways, solar lights and movement detectors can be fitted to reduce energy use of external lighting.