Seems to be. The circuits here have the old fashioned fuse-wire protection. The bulbs are now all low energy. Sure enough, one blew just now and blew the fuse in the lighting circuit for it. That is not the first time that has happened. The only time that I can recall the fuse blowing on the circuit before, when we had mostly the older bulbs, was when a friend tried to put a small bayonet cap bulb into a standard bayonet cap socket !
If it's not coincidence, I wonder whether any fuse in the low energy bulb itself is the fault.