The Federal Signal Viper S2 Dual Internal LED Warning Light with superior light output and easy pattern synchronization advances lighting expectations to a higher plateau. Exceptional warning capability, versatile mounting and simple product functionality make the Viper S2 stand out as the best internal warning light in the industry. Bold blocks of light and superior off-axis reflection are achieved using advanced Solaris reflector technology. Molded scalloped facets at the rear of the reflector direct LED light forward to form an impressive block of illumination. Two inboard side reflectors mirror high intensity LED light to the side producing wide-angle off-axis warning.