I used about 50 of these
https://smile.amazon.com/gp/product/...?ie=UTF8&psc=1
I tried 10W equivalent bulbs t match the 10W halogens that were installed, but the light output was not good enough.
Note I used the "warm white" 3000k bulbs. That might be why I stepped up to 20W equivalents. The 6000k bulbs were too harsh.
I would suggest you buy a couple each of the 3000k, 4000k and 6000k bulbs in 10W and 20W versions and try them out in different locations.
NOTE: these particular bulbs "require some assembly". I had to bend down the resistors on the back of the bulbs to clear the unused relectors, then I jut removed the reflectors. That was easy but the leads on these are thinner than the leads on the G4 bulbs and I had to crimp them in a subtle wave pattern to get them to stay in the mount. I probably won't use them again.
Cheers,