Thanks everybody! As usual, this board is more informative than hours of research.

At this point I am uncertain if at least give a try to led bulbs or go vith halogen. So it seems it it too early to use LEDs only.

Reasons why I was looking for LED solutions are

1. Less power consumption
2. No heating (very important)
3. Longer life

I am thinking that I may use LEDs in kitychen under suspended wall units (were heat is less welcome, since you end up working very close to them), and use halogen on the ceiling...