Solar Embedded Road Markers, Studs, Reflectors, Delineators, Bollards, Signs, Decorative Lights SRS0150A , SRS0150B, is for these areas that sun energy is very good. Over 3.5 KWH per square meters Dia.80mm products, SRS0180A, SRS0180B, is for these areas , sunshine energy is over 2.5kwh per square meters Dia.100mm products, SRS01100A ...