leds are sensitive electronic devices that can be damaged by overvoltage and overcurrent transients caused by system switching, electrostatic discharge and nearby lightning strikes. in addition, the switch-mode power supplies used with leds do not provide the transient protection of the inductive ballasts...
all purposes in trade and commercial parlance. dolomite usually contains impurities, chiefly silica, alumina and iron oxide . for commercial purposes, the percentage of combined impurities should not go beyond % above which, it becomes unsuitable for industrial use. it is then used only for road ballasts...