I did what Roy did for some fixtures, but bought direct replacement LED bulbs for the fixture he is showing.
I learn that you buy the biggest number of LED you can find for that application and I remember my boards have 48 pcs.
When the boards have to be used in some fixtures due to wedge, or tube sockets, I like rounded LED bulbs for overhead lights as they spread the light more evenly.
New technology Mexico is mentioning might sound interesting, but do I really care if my lights use 1 amp , or 0.98 amp?
I think the biggest advantage is LED panel in refrigerator. Not only much more light, but the old tube bulb at 10W did produce noticeable heat.
With those self-stick boards I am thinking about adding 2 more for the fridge and if I figure out a switch, one for freezer as well.