Lumineo micro LED Flashing lights (4 feet) are an easy way to light up your holidays. All lighting sets feature the latest LED technology. They can be used indoors or outdoors. Bulb life is approximately 50,000 hours. Always cool to the touch. Includes 16.5 ft lead wire. UL (Underwriter's Laboratories) approved transformer. Decorate your exterior and interior and let the flashing lights fall loosely over stone walls, fences, railings, hedges, or attach them to flagpoles or racks and similar fixtures.