I would argue with the first two columns. I don't have the means to do quantative measurements of the light outputs, but, subjectively, I do not believe an 11 Watt CFL is as good as a 60 GLS, nor a 20 equivalent to 100 Watt. Seems very optimistic to me.(But don't blame Screwfix; these are commonly quoted figures.) Anyone here actually measured their outputs in a scientific manner?
I do not believe an 11 Watt CFL is as good as a 60 GLS, nor a 20 equivalent to 100 Watt.
I don't know Geoff, I've got an 11 watt CFL here in my garage (until I upgrade the lighting) and a 60 watt Incandescent lamp nearer the back and they look reasonably similar in light output. Of course that is only subjective too, I don't own a lux meter to be able to compare them.
Re: Filament lamps -- The end has already started
#170324 10/31/0705:55 PM10/31/0705:55 PM