Originally Posted by
GrumpyDiver
Yes they can help, but the problem with fluorescent fixtures is that there are so many different types out there, cool white, day light, warm white, etc. Add to that each fluorescent tube manufacturer has its own "secret sauce" of phosphors that have their own spectral characteristics, that are different even when the tubes are labelled with the same colour temperature rating. Trying to design a universal filter is impossible, but at least they improve the light.
I'd have to agree, they do cut back the amount of light, but it's really the only way to address that green spike that is characteristic of these lamps.