actually it may depends on many things, the space of your room, you home furnitures and many other aspects .may be you can get some idea here:
In hall, lobby, passageway, living room, small-sized spherical lamp, oblate and square ceiling-mounted luminaire can be your choice and make sure their sizes are fitting for the space. Sometimes there can be spotlight up in the entrance place. Lamps for hall, passageway and other rooms shall have different importance on primary and secondary.
Drawing room can be divided into two kinds: large-scale drawing room and drawing room for household. For large-scale drawing room, we recommend mixed-up decoration and general illumination together with local illumination for household drawing room. Such as wall lamp, spot lamp and flush light lamp can be used as local illumination, ceiling lamp and ceiling-mounted luminaire can used as general illumination.
The main function of bedroom is rest, not just sleeping. Many families also make up and store clothes in it. Lamplight shall be mild and graceful. Diffusion may be optimal.
The color of the lamp is most important for dining room. Any improper color may change the color of dishes. Warm color is widespread and avoid cold one.
Direct illumination or vertical illumination is perfect for reading room. Radiating from your left hand and in front of you is both OK. You can select a desk lamp with arm coming back or with a switch to adjust light.
here you may find a proper one: www.imigyled.com
[Edited by chrys.zhang on Mar 15, 2012 at 9:25 PM]