They will also last longer if the metal filament is thicker. Which is the way they artificially limited the lifespan.
But if the filament is thicker you need much more current to get the same level of light, hence much lower efficiency, like your parent comment said.
That changes the resistance and thus efficiency
But if the filament is thicker you need much more current to get the same level of light, hence much lower efficiency, like your parent comment said.
That changes the resistance and thus efficiency