Tweets, starting points:

• https://twitter.com/andy_matuschak/status/1302376320450535424
• https://twitter.com/guillefix/status/1302415910746165250
• https://www.benkuhn.net/lux/
• https://meaningness.com/metablog/sad-light-lumens, follow up: https://meaningness.com/metablog/sad-light-led-lux
• FB Group: https://www.facebook.com/groups/465488087163164/
• https://www.lesswrong.com/posts/hC2NFsuf5anuGadFm/how-to-build-a-lumenator
• https://arbital.com/p/lumenators/

Types:

• Corn cob bulbs

• LED strips (https://twitter.com/ctbeiser/status/1302417120391622656)

• HMI (halogen metal iodide) bulbs

  

LED Twitter:

• mchapiro
• ctbeiser
• getchroma

Research: