Question

Why do lamps light up?

Answer 1

When a light bulb connects to an electrical power supply, an electrical current flows from one metal contact to the other. As the current travels through the wires and the filament, the filament heats up to the point where it begins to emit photons, which are small packets of visible light.

by the way i got this from google but hope it helps u

Answer 2

Lamps light up by electricity. Although, i'm sure you knew that by now. When a light bulb connects to an electric power supply, an electric current flows between the two metal contacts. As electricity flows between the wires and filament, the filament heats up. The filaments begin to emit photons, which are essentially small packets of light.

Hope this helps!