You will be happy to know that household fixtures designed to handle incandescent bulbs up to a maximum of 60 Watts operate extremely happily when fitted with LED bulbs designed to deliver “100W Equivalent” illumination.
So, you can actually get MORE light out of your old fixtures without exceeding their electrical design limits. Also, if the internal dimensions of the fixtures permit, you can go to the larger-sized A21 and get 150W equivalent units, or even go up to A23 size and get 200W equivalent units.
JUST BE CERTAIN you get 2700K bulbs or you won’t get the pleasurable glow of “warm white” light those old incandescent bulbs gave off.
I’ve put 2700K “60W equivalent” LED bulbs side-by-side with old 60W “warm white” incandescent bulbs in a multi-socket fixture, and found the characteristics of the light from each to be indistinguishable to the human eye.
As a last comment, I might consider going as high as 3000K in a Kitchen or Garage/Workshop, but any higher than that and the light gets into an unpleasantly piercing blue-white hue.
Thanks for the detailed information. Much appreciated.
Enlightening. (😇)