2 ms·
Similarly, sodium lamps get 100-150 lumens per watt. https://en.wikipedia.org/wiki/Sodium-vapor_lamp https://en.wikipedia.org/wiki/Sodium-vapor_lamp Good for l
by emmelaich 7y ago
Similarly, sodium lamps get 100-150 lumens per watt. https://en.wikipedia.org/wiki/Sodium-vapor_lamp https://en.wikipedia.org/wiki/Sodium-vapor_lamp
Good for low light pollution too.
Popular in Australia; are they popular elsewhere?