Lex, I've read those same reports too, but I don't believe there is a machine that can measure what the mind perceives . I've always been a night person since I can remember I have spent 28 yrs driving a truck,25 of those have been spent running a team operation , of which I have run the night shift. I'm always the first to try a new lighting product & have spent way too much $$$$ on this stuff. When your life & your co-drivers life depend on you & how well you can see things at night ( the last 13yrs that co -driver has been my wife ) in all types of weather, you tend to ignore those reports & make your decisions based on what you perceive. It's just like sunshades, some people wear yellow & some wear green.
Here's a whole bunch of stuff 'bout lites http://www.webbikeworld.com/lights/index.htm