It's about installing spot lights in the kitchen.Area 4m by 10m half actual kitchen half dinning area. (down stairs in terrace house).
Could you help me with the vast choice available. Iam looking for
economical, energy saving, efficency  hal or conventioal lamps 240v or 24v open to sujestions.Thanks

There really isn't any such thing as an economical halogen bulb. Nearest you can get are IRC type halogen bulbs. A 40W IRC produces as much light as a 50W regular halogen.

For best economy install CFL (but they take awhile to warm up) or LED (but they are very very expensive at around £50 per spot).

One possibility might be a mix of CFL and halogen.

As this is in a kitchen you either need to employ a Part P Electrician or make a Building Control Application.

if it was my kitchen i would be tempted to go for 35W IRC lamps (give 50w output).

if i was a bit more energy conscious i would go for JCC low energy fittings that come with 11w megaman lamps.  Megaman now do 14w GU10, which might be a bit better but i havnt had chance to try them yet.