A google search for "comparing LED, CFL, and, incandescent brightness" returns hundreds of charts showing what equivalent wattage of LEDs and CFLs are to match an incandescent bulb. This is fine for figuring out what bulb to use at home -- I'm interested in more rigorous, evidence-based studies showing how they actually compare.
Is anyone aware of such a study, or where to look for it? There are a few promising leads on a google scholar search of peer-reviewed publications, but without paying for access to multiple journals I can't see if any are worth the cost.
Ideally I'd like to see, for various brands and wattages of LEDs, the range of wattages for CFLs and incandescent bulbs with an equivalent luminosity.