These exciting flashing strobe light style retrofit replacement bulbs are red 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 1.7 watts of power so you can safely connect up to 660 bulbs on one 15 amp circuit. They are waterproof and have an IP rating of 144. The flash rate is 180 per minute. Great for Christmas and Valentine's Day too.