Yes he has a lot of good info on there. Helped my pick my light for my wife's 20 were in the process of planting.
And about the health that comes with good light I was at the hospital the other day (seeing a friend there fine) and seen a poster in the lobby advertising LED
light therapy for infants. Don't know exactly for what bit it just confirmed what he said about that in his article.
Also its prob a good idea to read it over I had to read it 3 times before I understood it all. Fully at least.