Started with 100W x 2 tungsten moved to 60W x 6 tungsten then 11W x 6 CFL then to 8W x 10 CFL with an output of 310 lm. These were Philips SES (E14) with a life of 10 years before 50% should have failed but they did not last anywhere near that time and the cheaper 8W replacements were slightly larger in globe size and brighter the other room also had 6 of the same size lamp so all 6 replaced with larger type and spares kept for main room. 3 years on and only 6 of the original 16 left so much for 10 years to 50% failure.
When two had blown I had two 1.4W 100 lm LED candle bulbs bought for reading lamp so stuck them in until I could buy new. Rather surprised as seemed same output at original 8W 310 lm bulbs. Two more failed again temporary replaced with 5W folded tube CFL and again brighter than original. Lidi then had some 3W 250 lm LED candle bulbs bought all they had and replaced all the non candle bulbs with 8 of these so now all matching even if two are slightly dimmer being 1.4W 100 lm and oh what a difference.
The room has never been so bright. 2200 lm of light is it would seem more than 3100 lm of light!!!
OK satisfied with the room instant bright light but with the rated lm output and watts used clearly not anything to do with how good the bulbs light the room how do we select lamps?
I do wonder how much is to do with the direction the light leaves the bulbs I note LED lamps are often given an angle of spread so although they seem to radiate light in all directions they may send most of it up to the ceiling which being white will reflect well. However sure the CFL were really the same.
So if watt and lumen input and output don't give us how Tungsten, CFL and LED compare how do we select replacement bulbs?