What street light is made of
Lighting streets (gas, arc, LED).
- LED — has part. LEDs.
- Photoresistor — has part. Switching on at dusk.
- Arc lamp — has part. The first electric street lights were arc lamps (the “Yablochkov candle”, 1878).
- Cast iron — is made of. Lamp posts are cast iron, later steel.
- Glass — is made of. The shade is glass.