When David Chapman's "You need more lumens" article came out (which is referenced in the original post), I was on the verge of building a similar setup but at s

When David Chapman's "You need more lumens" article came out (which is referenced in the original post), I was on the verge of building a similar setup but at some point read similar concerns on light therapy. Not necessarily effects on circadian rhythm, but retinal damage from staring close to the amount of light. From https://meaningness.com/metablog/sad-light-lumens https://meaningness.com/metablog/sad-light-lumens : "The clinical studies were done with 10,000 lux provided by a bank of fluorescent tubes in a box that directed most of the light forward. Very roughly, if you are a couple feet from a box like that, 1 lumen produces 1 lux." It'd be interesting to see studies that have these lighting setups but don't involve staring towards them. The setup that I'm happy enough with: a set of LIFX bulbs in normal light fixtures. They seem to put out more lumens (1100 lumens) than other color-changing led bulbs. If you don't want 'smart' lighting but still want the ability to change color temperature, Philips makes "SceneSwitch" lights (800 lumens) that will cycle color temperature based on turning on/off.