The sturdy and humble bollard serves a number of functions—including wayfinding, illumination, security, and as a bicycling obstacle—and come in many shapes and materials, such as concrete and granite. Calpipe Security Bollards uses metal to make its SSL series of lighted security bollards. The weatherproofed and durable bollards comprise a carbon steel core to withstand impact and an outer sleeve of stainless steel for a long-lasting and low-maintenance finish. The series can use CFLs, LEDs, and metal halide lamps. •