Here's something new to add...

Aside from using CFL lights instead of incandecent lights, there is a new type of lights which are LED based. LED lights typically consume only 1 to 5 watts of power depending on application and brightness.

So far only Philips seems to have LED lights in the market. From what I know, you can find them in most ACE hardware outlets. Downside, these new high tech bulbs cost a bit of money, between P200 to P500 per bulb, depending on the model. Plus side, LEDs do not easily burn out even if you constantly turn off/on your lights (convensional bulbs & CFL lights have a dramaticall shorter lifespan if you do this).