The PROLIFIC Series Roadway Luminaires provide replacement for existing high intensity discharge ( HID ) lighting installations for highways , city and residential streets , college campuses , government facilities , parking facilities and commercial projects . Four versions of the PROLIFIC luminaires , LSR1 at 50 watts through LSR4 at 150 watts , are available to replace 100 watt to 250 watt HID cobra head fixtures . Designed to deliver high quality illumination combined with energy efficient LED technology , the LSG roadway luminaires provide superior optical performance and maximized pole spacing . By using an internal thermal management system , the PROLIFIC luminaires feature a clean , streamlined housing eliminating the need for external fins . The sustainable design incorporates custom arrayed optics and uses recyclable , corrosion resistant materials . The design and technology incorporated in the PROLIFIC Series Roadway Luminaires is the subject of several pending patent applications .