I know some people in the UK that still use gas lighting, in Victorian era houses.
OK replaced the GU10 socket bulbs in the bathroom (2x40W & 2x50W halogen) with our new 5W LED 450lumen bulbs... there's corners of the bathroom I didn't know existed before now! Also swapped out 2 of the 3 50W halogen in the kitchen for 5W 450lumen LED bulbs, and left the recently put in 42W halogen in the middle and it's ultra bright in there too... brighter than ever. Wife is complaining their too cold... but I think the fact that they seem to be double or triple the amount of lumens we had before makes it seem that way more than the temp, these are all 3000, the other option was 4000, and that's more blue/white in colour. I suppose less lumens might have been less dramatic, but this seems to be pretty good, especially if it brings down the power bill.
good CFs are pretty close in price to good LED versions here... except LED's are supposedly 10years vs 3 or so on CFs plus the whole instant on debacle...