The kind of studio lighting most people envisage when they think about film and TV sets are the large Fresnel lensed fixtures hung high up on a grid, six or seven metres off the studio floor.
There used to be good reason for this, early TV cameras needed 2000 lux just to create a picture. This was a lot of light and in the case of tungsten lampheads, a lot of heat, which is why studios where built so high - it gave the heat somewhere to go and the lights were far enough away (hopefully) not to burn the cast and crew!
Today cameras are more sensitive, and lights (especially fluorescent) are cooler, therefore studios can be created in spaces which were previously offices, for example. This doesn't mean you can tape light entertainment shows under the stairs at home, but it does mean professional looking programs can be made on much more modest budgets.