I found another page from New Zealand government saving energy plan :
http://www.rightlight.govt.nz/
Here they showed lots of choices on types of bulbs to save much energy. Some screen shots here
And some tips from that page :
Use lamps to light work desks
Use table lamps or task lighting to light work desks rather than lighting the entire room.
Dispose of CFL bulbs correctly
If there are no CFL disposal facilities in your area, the dead bulb should be disposed of in the same way as any other light bulb ie. wrap it in newspaper and dispose with your household rubbish.
Turn lights off
The simplest way to save energy is to turn off lights when you're not using them.
Use CFLs in high-use areas
Use CFLs in light fittings that are turned on for more than 15 minutes at a time or several hours per day to maximise energy savings.
Replace lights to save
Replace incandescent lamps with CFLs or new generation halogen bulbs to save energy and money.
Really lots of tips, some of them are old school-ed but some impressed me, I was like "Oh, really, I've just known those". Really interesting information
