I made a lighting for the dining room with 4x 3000K COBs and a meanwell driver and the result is superb, the family commented how the food looked more appetizing and colorful, well before it was a classic 80CRI philips lightbulb so of course the change is probably more noticeable than with 90CRI lightbulbs that are commonly available.

I also swapped the COBs in some samsung lightbulbs as mentioned before, just needed to tap 2 holes for mounting the new COBs, quite easy. I tried to do that in the philips bulb (~76V, 170mA so good for 2x36V COBs in series) but I can’t seem to dismount the aluminium base for taping hole into it (if I do it in place some aluminium bits will fall inside the driver area, not very good I think…), maybe I could mount them with adhesive thermal paste but I don’t have that (this stuff seems to be expensive).

We tested 4000K in a few rooms but we don’t really like the colder tone, so I have some I dont use.

Do you want me to send you one maukka ? as you haven’t tested this CCT.