These exciting flashing strobe light style retrofit replacement bulbs are blue in color. They are faceted LED screw-in replacement bulbs designed for traditional incandescent C9 (E17 socket) sockets. They are 2" long. Each has ten super bright LEDs encapsulated by a hard-to-break lens (unlike the old-fashioned and very fragile incandescent bulbs). Fits directly into existing traditional sockets without extra transformers. Saves a considerable amount of power on electric use. Each bulb consumes 1 watts of power They are waterproof and have an IP rating of 144. The flash rate is 180 per minute.