*If you are burning bulbs to frequently you also might try using lower
wattage bulbs. A 40 W bulb has a higher resistance than a 100 W bulb.
Both bulbs will have the same voltage, the 100 W bulb must have more
current. And that means the 100 W bulb must have a lower resistance.
So the filament for the higher resistance 40 W filament must be
heavier or have a smaller cross section. There is also a rough service
bulb that is made with a heavier filament.

Bzzzzt.

the 100 Watt bulb will have a lower resistance and therefore a heavier
filament and thicker cross section and be more rugged...

Mark