Still some, some do not answer, ah, then what are the benefits of the reasons?
This is related to the light source used for explosion-proof lamps. Some light sources must have ballast, some do not
A lamp without ballast is a lamp that produces light with a short circuit of a tungsten filament, such as an incandescent lamp.
See what light you're using.The ballast lamps are basically gas discharge lamps, such as metal halide lamps, high pressure sodium lamps, etc.. Because some lamp is filled with special gas, high voltage breakdown is to start to start, and after the gas within the lamp turned into a low resistance state, so as to generate high voltage ballast at startup (usually Vp 500---2000 volts, after the start of the ballast range) to control the current size (ballast) to prevent light resistance is too small to lead to similar short-circuit condition.
