It's a lot of work and unless done very neatly your floor boards may look rough after you've reinstated them. But here's an idea, you could replace a single pendant light fitting (bulb holder and ceiling rose) in a kitchen for example, with a mains voltage track or tracks. I did this in our kitchen putting in two LED (brand name of light fittings) mains voltage tracks and with 6 no. G10 lights. I was able to highlight the work areas, features in the kitchen, cost about €120 and took less than an hour to fit. There's no transformers, the bulbs (being mains voltage) last a long time and these light fittings are very popular now, especially in commercial use. Any good electrical wholesaler would stock a range of such fittings.