Bruce - Thanks for the reply; I really hope you are right.
On further frantic googling, I'm left with the impression that halogens are not going to be banned at this stage, though as usual no-one seems sure. If anyone has got a definate answer on this one then that would be good. It made interesting reading for me anyway, as it turns out that traditional incandescent bulbs are 5% efficient (which I knew) and halogens are 9% efficient. Compact flourescents are 20%...
Steve - there are indeed 3 kinds of GU10. The term 'low energy' seems to have some degree of flexibility to describe the other two technologies, those being compact flourescent and LED. Both of these two use far less energy than the halogen. As I understand it, LED uses the least of all.
The problem at the moment is that flourescent is difficult to dim and (unless someone knows better) there isn't a way of dimming the LED fittings.
RAKO is one of the many kinds of lighting controller on the market. In my room, there will be 4 lighting circuits. You put a Rako radio controlled dimmer in ceiling next to the lamps, inline ones with the table lamps, box mounted ones etc. So it is really easy to retrofit (in theory, haven't done it yet

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What then happens is you can set up lighting 'scenes' such that, at the touch of the button, the table lamp goes up to 70%, the ceiling lights turn on etc. This should all work with my Harmony 895 remote (with the RAVIR interface) so I should be able to hit 'watch DVD' and it will sort out the lights as well as turning on all the relevant devices and starting the film