The Edwards 51 series AdaptaBeacon flashing lights with horns are designed to provide a bright visual indication utilizing special optics within a Shatter-resistant polycarbonate lens. The polycarbonate double fresnel lens ensures efficient light dispersion. This is accomplished with a series of complementing fresnels that cause the dome to "fill" when the light is operating. Beam distance is also increased with fresnel lenses. Lenses are available in six colors: red, amber, blue, green, magenta, and clear. The unique base design allows horn audibility while maintaining the unit's weatherproof integrity.