SuperSpark 5mm LED strobe lights.The Christmas Light Emporium is the home of the original 5mm LED strobe light string – SuperSpark This is not a twinkle string with a subtle on/off – this is a true *pop* LED 5mm strobe string that creates a fantastic effect in your light display. All 50 of the bulbs on this string strobe randomly to create the effect of tiny camera flashes. When wrapped around a tree, through shrubs or on any structure, this string will make your display sparkle. These can be left on all night to create a magical environment.