A light bulb was a device that used an electrical current to produce light. Bernice Summerfield had a joke involving light bulbs and Sontarans: "How many Sontarans does it take to change a light bulb? None, the bulb died a glorious death!" (PROSE: Sleepy)
Ad blocker interference detected!
Wikia is a free-to-use site that makes money from advertising. We have a modified experience for viewers using ad blockers
Wikia is not accessible if you’ve made further modifications. Remove the custom ad blocker rule(s) and the page will load as expected.