Direct all external lighting onto a surface and minimise spill light into the sky.
Save up to 30% of your lighting bill
Lighting contributes to electricity consumption both directly and indirectly. Directly by using electricity to power lights, and indirectly, by increasing cooling requirements in the building and the need for air-conditioning.
You can offset this cost by improving your lighting efficiencies.
For example, a standard 100W incandescent bulb that costs around a dollar may seem like good value. But in reality, an equivalent 20W compact fluorescent lamp (CFL) that is a few dollars more to buy will cost you far less money in the long run. That's because typically CFLs use around 80% less electrical energy, and they should last at least 6 times longer.
The most efficient lighting option is often the least expensive on a life-cycle cost basis
Modern light fittings and lamps typically: