Super Bright 4 LED Strobe Light Head 1 Watt Blue 851 Strobe Light 851 High Power High-Intensity Strobe Light Can be used for interior or exterior lighting. Great for cars, motorcycles, trucks, surface mount, deck, dash or grille. Water-proof! Also has the option to be syncronization, so that all the lights can flash at the same time with the same pattern. Dimensions: Length 4.25", Height 1.25", Depth 1" Features: Each light has four 1 watt Super Bright LED's Durable Black Housing Long Life-Span Low in power consumption Weather-proof Has 22 flash patterns Generaton III LEDs