In a bulb shape in the main LED wins, however there is a problem in the way light is projected away from the base, so in general with the base at bottom and a white ceiling the base is kept cool and the light is reflected off the ceiling giving a good spread of light, but if ceiling not white then does not work as well. I found in general both CFL and LED bulbs need to be lower output and more of them. So living room tungsten was two 100W bulbs, this changed to 6 x 40W bulbs two groups of three, to get more light, went to 6 x 11W CFL but did not look good so moved to 10 x 8W globe CFL, however rather a failure bulbs had very short life so went to 10 x 3W candle LED lamps from Lidi, room looked bright, however hard to read, so also fitted new lamps in mothers house with smaller rooms, so the 3W went into mothers house, and 5W globe fitted into my house for Home Bargains this is a problem, working out size required. However from 1979 to today the living room started at 200W then 240W (some times fitted 60W so even higher) then 66W then 80W then 30W and finally 50W. So today use a 1/4 of the power to light the room, however also had to change central heating originally one boiler did domestic hot water and space heating, now a separate boiler for domestic hot water, as heating not supplemented by heat from lights any more.
But move from living room to kitchen and the story changes, kitchen extended so today even during the day it needs electric light, apple tree does not help, but two fluorescent tubes in line, now a fluorescent tube 65W was used for new section, however these were discontinued, now only 58W are available, so either I had to remove lamp, replace the ballast (or whole lamp) and refit, or I could slightly change internal wiring and fit a LED replacement for the fluorescent tube, being lazy I went to LED, however the LED was 24W and fluorescent 58W so lumen for LED 2400 and for fluorescent with electronic ballast 5500 approx, so light output around half that of the fluorescent, lucky that half of kitchen can still be used with less light, but when the tube went in the other side of kitchen it was replaced with fluorescent as needed the light, also 6 foot tubes hard to find as LED, 5 foot and less yes loads but 6 foot not so many. You can get 50W LED tubes, but in the main the LED tube is designed so although you can remove the ballast, with a wire wound you don't have to, all you do is change the starter. This means the ballast gives off heat, so even when the 24W is rated at 2400 lumen, when the ballast is not removed it uses more than 24W so not as good as they seem on paper.
Now the 2D lamp is also classed as a CFL, some of these specials give out nearly the same lumen per watt as the LED replacement, especially if the old ballast is left in place, so although with a bulb the LED is often better than CFL this is not reflected throughout the range. Both fluorescent tubes around 95 lumen per watt LED around 100 lumen per watt, when between 18 and 70 watt, however as a bulb the CFL drops to around 50 lumen per watt and LED around 70 lumen per watt. There is a problem in the way lights are wired, we often run the switched line and permanent line together in the same cable, and we allow a small amount of current to flow through electronic switches to actually work the switch, so unless a leak resistor is fitted in the bulb they will either flash every so often or glow dim. By law LED lamps must state if they can't be dimmed, most bulbs can be dimmed, this has two problems, one is the leak resistor to stop them coming on dim, the other is if they use a pulse width modulated current regulator it would in the main auto compensate for dimming switch so they would not dim, so in the main bulbs use a cheaper method of current control, the simple capacitor in series, this reduces the over all lumen per watt. So in general the larger the bulb the lower percentage of waste. It does not matter if 3W or 11W the bulb needs to sink the same amount of power so it will not glow with a dimmer switch when switched off. However in general the more LED bulbs the better the spread of light, so a happy medium as around the 5W mark. With GU10 lamps a bit less, because the area giving out light is reduced to allow for cooling fins, around 3W is happy medium, which in general means to use LED lamps also means replacing the fittings, mothers house both rooms down stairs now have two fittings, and this is the main problem with LED, area matters.
