High pressure sodium lamp is a kind of high brightness street lamp. What kind of material is it?
The LED driver can easily do more than 90%, and the circuit is simple and stable. But since LED is cold light source, the electrical energy into heat 90%, is not easy to solve the heat radiator, such as LED >700W lamp than high-pressure sodium lamp radiator 700W much.
The wick is the arc tube and getter ring fixed on the stem with metal stent, two electrodes of the arc tube are respectively connected with the guide wire in the two columns. The core is composed of a guide wire, the exhaust pipe and the horn by high temperature flame fused into one. The expansion coefficient of the metal guide wire and the sealing part of the glass shall be matched with the expansion coefficient of the two sealing materials, so that the glass at the sealing point can generate stress and burst or the bulb will be chronically leaking. Among these are sodium, mercury, xenon and other substances.
The reason is that the energy saving efficiency, driving circuit of power factor, high pressure sodium lamp inductance and electronic drive type, efficiency less than 60% inductance, the electronic efficiency is less than 80%, is able to heat source, heat radiation.
