The objective here is to maximise awareness and behaviour of when and where lights are being used, and to control lighting in response to need whilst making maximum use of daylight.
|Natural daylight||Artificial lighting|
- Maximise use of daylight, e.g., hold off switching on lights in the evening until necessary.
- Rooms should be furnished to allow daylight in and activities for which daylight or sunlight is essential should be positioned near windows, e.g. reading.
- Furniture and other obstacles should not obstruct daylight penetration of the room. Net curtains and blinds will reduce daylight penetration of a room.
- Dirt on windows can reduce performance by 10% and even more if the dirt is allowed to build up on skylights.
- Paint the surfaces of rooms, including ceilings, with colours of high reflectance to maximise the daylighting opportunities. Light colours reflect 80% of light while dark colours reflect less than 10%.
- Switch off lights when rooms are not in useSwitch off lights when rooms are not in use
- Make use of task lighting wherever possible, e.g., lamps rather than whole room lighting when a small amount of light is required.
- Regularly clean light fittings, reflectors and lampshades.
- Use dimmer switches and multiple light switches effectively and only light the area of the room you are using rather than the whole room.
- Switch off all possible lights at night (if needed select one as a nightlight to be kept on — remember to switch it off during the day)
- Replace failed light bulbs with Compact Fluorescent Lamps (CFLs) when appropriate and take account of things such as shape, size, colour and natural light in a room, before deciding what wattage CFL light bulbs the rooms in your house require (see www.seai.ie/powerofone).
|Actual Energy Savings|
|Below are examples of the energy savings made during the Power of One Street campaign which worked with a number of families around the country as they reduced their energy consumption, and who were able to make significant savings by applying the energy tips and by changing their behaviour.|
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The Brennan Family
A family of four, living in a detached, timber frame house, built in 2003.
Step 4: Lighting
- Energy Reduction = 34%
- CO2 Reduction = 0.5 tonnes
- Cash Saving = €110 per year
The Horler Family
A family of five, living in a detached, cavity wall house, built in 2004.
Step 4: Lighting
- Energy Reduction = 32%
- CO2 Reduction = 0.25 tonnes
- Cash Saving = €50 per year
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|Some low-cost options to save energy|
Energy-efficient light bulbs
When purchasing new light bulbs, choose energy efficient CFLs, for spotlights use Infra Red Coated Halogen Bulbs (IRCs) or use fluorescent tubes for lighting as appropriate.
Compact Fluorescent Lamps (CFLs)
CFLs use 80% less electricity and last up to 10 times longer than ordinary light bulbs. Start by installing 3 or 4 of these CFLs in those areas where lighting is used for the longest periods, e.g. hall, landing, kitchen and living room.
Having several independently switched lights in a room allows the appropriate lighting level to be selected to suit the activity.