> I think that we'll start to see improvements in this area as people move away from "screw-in bulb" as the form factor and towards using external power convert

> I think that we'll start to see improvements in this area as people move away from "screw-in bulb" as the form factor and towards using external power converters delivering power to to LED fixtures that are just LED's and their heatsink + mounts. These already exist. Nearly every architectural grade fixture has a separate 24VDC driver, the LEDs, and a heatsink. Here's a cutsheet for a Lithonia recessed can as an example: https://lithonia.acuitybrands.com/products/detail/748533/Lithonia-Lighting/LDN6RV-Retrofit-Kit/-/media/products/Lithonia_Lighting/748533/document/LDNRV_pdf.pdf?DOC_Type=SPEC_SHEET https://lithonia.acuitybrands.com/products/detail/748533/Lit... These run for $175-200 a piece. They list 70% lumen maintenance at 50,000 hours. That's 20 years at 12 hours a day for 220 days a year. Some architectural cans are a bit cheaper, some are a bit more. Cheap LED 2x4s go for $80, pricey ones for $200.