The maximum voltage of 500V.Meet your need of different lighting effect.It has 3 light socket,it is very durable and long lasting ,a great choice to replace old lamp holder with.These T8 lamp holders are very easy to use. You can use it to replace the old and damaged lamp holder for your T8 Light.Applicable to grille lamps, stent lights, cleaning lamps, and other types of straight tube fluorescent lamps.