I don't see any info about the spectrum produced by the bulbs he recommends. Color temperature is one thing, but that's equivalent to describing a chord with just the root key. I suspect that a spectrum as close to the sun as possible (including UV and IR) is better.
>>dietri+2
I took an interest in this a while ago after travelling a lot then coming back to Scotland. I seem to remember blue light being recommended. Moved to Barcelona and never really thought about it since.