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Phosphor lamp

The Fifth Doctor and Chief Scientist Range light the way with phosphor lamps. (TV: Frontios)

Phosphor lamps were used for lighting. They used electron excitation; when shaken, they grew brighter.

The human colony on Frontios used phosphor lamps as their primary light source as they had no electricity. Turlough claimed that the metal casings on the lamps made them a fire hazard. The Fifth Doctor had Turlough and Tegan return to the TARDIS to fetch a better light source as he could not work under the lamps' dull glow.

When the Doctor and Norna were captured by Tractators, Tegan freed them by throwing a phosphor lamp among them. The explosion injured them and allowed the Doctor and Norna to escape. (TV: Frontios)

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