Several years ago, when I was doing a lot of research on bird lighting, I met a veterinarian from the UK, Frances Baines, he has since retired, but he and fellow herp lovers do independent research and maintain the website
UV Guide UK - Ultraviolet Light for Reptiles - UVB reptile lighting on test it is always evolving & may have parts of it in update mode.....they've never had a really quick website, but every time I've looked around it, there's usually something new.
Unlike in the U.S., advertising in Europe is held to a different standard, you can't blatantly lie about what your products cannot do, but as far as the best UV information for herps, I think it is on that site.
I just looked at the site for the first time in probably a year, I've been otherwise preoccupied, and on the front page of their website there is this headline:
Special Report : Eye problems with some high UVB fluorescent compact lamps and tubes
I have not yet read the attached article, but figure it's not supportive of the mentioned CFLs.....
For the best information on lighting products, I would have to say that would be from
Rensselaer Polytechnic Institute, one of the top engineering universities in the U.S. and its Lighting Research Center can answer virtually any question on lighting you might have, but I'm sure they would shy away from providing you an answer to what would be the best individual product.
They do however, give you the information about where & how the industry skits factual truisms and what a given light source, incandescent, fluorescent, Cfls, etc.
can and cannot generate in reality.....the individual reader must make their own, informed decision as to what would be the best item for their needs and that of their feathered friends.
There are studies being done on cold lighting (LEDs and other solid state light technologies), so I'm sure there will be more factual information on those systems forthcoming, to stay updated, I might look for information on "solid state lighting."
There's a lot of reading about the various synthetic lighting sources from here:
About the LRC | Lighting Research Center
For more info about full spectrum lighting and companion birds, Patrick Thrush is considered by many, to be the best informed aviculturist on the subject and while a lot of his writings on the subject were first published back in the late 90s, you have to realize that the lighting industry has not changed very much in the last 20 years and has pretty much directed how the consumer relates to its products and what the consumer understands or more properly believes about their products.....in the United States there is no requirement for "truth in advertising."
As for us parrot lovers, we're but a very, very, very small percentage of that industry's revenue & I seriously doubt that we will see serious investment in true lighting technology for birds in the foreseeable future.....
Sorry for the book, but like rehabbing animals, there is no short answer.....