ALWAYS ON LED STRING LIGHTS: Others LED lights always on lighted if have some bulbs to drop out. SIMPLE AND ELEGANT: The slender and soft twisted wire construction is suitable for decorating anyplace. EASY TO USE: US style 2-pin plug in, it can be installed quickly and easily, no tools required. LED COLD LIGHT SOURCE: LED lights use 70% less power than traditional incandescent bulbs, long life more than 15,000 hours. END TO END: Connect up to 15 sets LED string lights for 500 ft. 100 count bright white mini LEDs, 33ft length and 4 inches spacing, UL plug in and 22# white wire, end to end connect up 15 sets, AC 120 volts, 13.2 watts, for indoor and outdoor festival, party, garden.