We're refrusbishing all of a big victorian house (including removing
various internal walls to make the whole ground floor entirely open
plan). We're now at the stage of planning the lighting/electrics.

While we're basically keen on using some sort of downlighters almost
everywhere (for a clean modern look), I'm a bit overwhelmed by the
options - halogens, leds, fluorescents, and on top of that the 240v vs
low-voltage options.

Does anyone have any recommendations as to which of these to go for --
in terms of initial cost, convenience (e.g. dimming?), long-term
costs, etc?

For the master bedroom (e.g. 4m x 4m) about how many downlighters
would be the right number? (We're planning 3 above the headboard for
reading, but aren't at all sure about the rest of the room).

thanks for any advice!

Vince.