Amidst the piles of random data, I happen to have the photometrics for the 55watt bicolor (F55-S).
The output seems to be about 3100-3800 lux (depending on CCT) at 1m distance - that's a bit less than a 300W tungsten fresnel at full flood (~3900 lux). Or a 150W dedolight at full flood.
A little bit more than a comparable size/type 60W Dedo DLED7, but I would be surprised if the light distribution curve was as good.
I am assuming the photometric data I have were taken at full flood, unfortunately have no way of checking. The numbers seem to add up, though.
PS. contrary to the article, Came-TV states their CRI at 96. TLCI is 98, which -is- pretty good and more relevant, but... ;-) /nitpick
As a few people already mentioned, it's a good solution for getting out of trouble (and I did use it quite a few times - more commonly simply because of lack of space for that big leg when next to a table etc), but I wouldn't make it a habit. Especially because a c-stand is not (primarily) a boom stand - if I need the reach I'd rather use a different tool. But yeah, there are also those jobs where you have limited gear, and that's where these "hacks" come handy.
Any "experienced professionals" screaming that this is wrong would clearly not be very experienced, because the important rules of a filmmaking technician is "you gotta do what you gotta do, and if it works, it works". If you need to break the rules to make something work, and it will still be safe in the given application, then by all means do it! I'd say it happens once or twice on every job I do that I specifically tell my sparks "I need you to do it the wrong way". If it works and it's safe (by which I mean, always give it a good shake to check stability), then why not?