Yeah, definitely not the first to consider this. I remember my Dad experimenting with proper lightning (brightness and spectrum) in the early to mid 2000s, and

Yeah, definitely not the first to consider this. I remember my Dad experimenting with proper lightning (brightness and spectrum) in the early to mid 2000s, and to him that was not really that novel. In my office room (32m²/340sqft), I use a commercial rail lightning system with three channels/phases (controlled via a Sonoff 4CH WiFi switch). Those are commonly used in stores, and I got my rails cheap via the local craigslist-equivalent. With 8m of rails (2m not attached, yet) I am very flexible with light positioning and can adjust the "light mode" for different room usages. Drawback: I am not somebody to buy light fixtures for a thousand bucks, so I found it difficult to find appropriate-but-still-cheap fixtures. For ambient light (not so bright) I got lucky with these cheap GU10 holders [1], into which I put some decent bulbs (3000k, CRI90+, 410lumen, dimmable, flickerfree [2]). As "desklights" I have bright spots (6400k, CRI95+, 1350lumen, 24deg [3]), which should give about 5000 to 7000lux with three lamps. The 6400k is a bit cold and the bulbs are non-replaceable, but other LED alternatives would have been much more expensive, so I got these to experiment with. So far I am happy. One interesting alternative are metal-halide lamps[4]: Those can often be bought in used condition for cheap, and offer replaceable bulbs by default (G12 socket). They are only little less energy efficient than my high CRI LEDs, and the spectrum also seems to be quite good. However, they start at 35W (e.g. 4200k, CRI91, 3400lumen) and don't seem to be dimmable. For a single spot that's a bit much, and spreading the light on the ceiling by using three or four is a bit expensive with our energy prices. They also have some additional drawbacks like warmup and cooldown times. Though maybe I'll modify one or two with WiFi switches so I can use them to boost the normal desklight using some Home Assistant automations. [1] https://www.ledpanelgrosshandel.de/3-phasenspot-schienenleuchte-mit-gu10-fassung https://www.ledpanelgrosshandel.de/3-phasenspot-schienenleuc... [2] https://www.greenandco.de/en/seocrap/a-100081 https://www.greenandco.de/en/seocrap/a-100081 [3] https://www.reichelt.de/de/en/15w-led-tracklight-colorcode-6400k-black-body-vt-1303-p201357.html https://www.reichelt.de/de/en/15w-led-tracklight-colorcode-6... [4] https://en.wikipedia.org/wiki/Metal-halide_lamp https://en.wikipedia.org/wiki/Metal-halide_lamp