Use tungsten bulbs with an infra-red reflective coating

Capital cost is around £4 - £5 per bulb (a little more than regular bulbs. The energy saving available is around 30%. If interior tungsten halogen bulbs are necessary for the lighting effect they create, then they can be replaced with equivalent bulbs with an infrared reflective coating (IRC). If the lights are on for around 2000 hours per year (typical 9 - 5 operation), payback will usually be between 2 or 3 years (payback will be quicker for longer hours). It is always economic to purchase IRC bulbs when standard tungsten halogen bulbs are due for replacement.