Maybe you find this interesting: https://optimizeyourbiology.com/light-bulb-database https://optimizeyourbiology.com/light-bulb-database It's a database of lig

Maybe you find this interesting: https://optimizeyourbiology.com/light-bulb-database https://optimizeyourbiology.com/light-bulb-database It's a database of light bulbs tested using a 1-meter barium sulfate integration sphere and calibrated lumen photospectrometer. Although no LED comes close to the Halogen in terms of CRI, it is very informative.