There's no real good answer here.
There's literally 100's of posts on here about led lighting on frf.
Cheap leds, expensive leds there's endless info here I can agree.
You should have 912 or 921 bayonet bulbs and there's hundreds of different replacements for these bulbs depending on what your looking for.
Ie cool white , warm white etc etc.
I'd buy a couple and see how you like them before buying all your lights.
Superbright led lights is one source ebay has thousands to choose from from pennies to dollars each.