How can I distinguish mercury vapor streetlights from metal halide streetlights?

Street lights have become imperative for lighting up the streets for citizens and drivers at night. But for some with unreasonable settings, lighting up streets

Intelligente Straßenlaternen sind zum neuesten Trend für die Beleuchtung der Straßen geworden. As more and more projects about setting smart street lights are carried

With the development of the internet, people are now considering connecting every field of city infrastructure to build a smart city. This can be achieved