I live in a 15 year old development where there are 400 20W down lighters on 24*7. Total energy cost including a fixed cost per (frequent - 750 a year) replacement is close to �10,000 pa; we're replacing the bulbs with Philips LEDs which are proving reliable and the colour temperature matches the old bulbs and the light fill is more even.

They use 20% of the electricity and the higher lamp cost (much less if you're buying 100 at a time) is offset by the reduced need to replace them, the labour for which we have to pay for, ladders and the rest.

Overall, the annual cost of lighting halls, corridors, lifts and the rest is coming down to about �3,000 pa, a useful saving.

Mark
MC200, AC200, M6, 557, G91