What kind of lamp is to be used as a ballast
By gas glowing all need, because the gas under the normal resistance is very big, need a ballast to generate the instantaneous high pressure breakdown him, after the breakdown resistance becomes small, small ballast is required to limit the flow
Like a fluorescent lamp, you need a steady voltage of electricity. Look at the effects of the ballast
Like a fluorescent lamp, you need a high voltage to start up, but you need a ballast to start the normal voltage and then return to normal voltage