4 ms·
This is mostly because street lighting was different. Sodium vapour lamps in the East, mercury-vapour (or perhaps high-pressure sodium-vapour) lamps in the West
by ygra 9y ago
This is mostly because street lighting was different. Sodium vapour lamps in the East, mercury-vapour (or perhaps high-pressure sodium-vapour) lamps in the West.
- _Microft 9y agoYes, that's exactly the explanation!