A round LED Bollard light and a square LED Bollard light are very similar in terms of lighting capabilities. Both round and square Bollard lighting solutions are ground mounted and provide light from top to bottom and the sides. The main difference is the way in which the light is projected and the overall design.
A square bollard has a more directed beam angle that make the light more focused and directed than a rough bollard that has a wider beam angle. Depending on your intended design either a square or round bollard can typically be used.
HomElectrical does not currently sell any solar powered bollard lights. However, LED bollard lights are highly efficient and reduce monthly costs in bills and maintenance as well. A 100-Watt incandescent bulb can consume 1,200 Watts over a 12-hour period where an LED replacement will use only a fraction of that energy as well have a longer lifespan.
LED bulbs comes in a variety of brightness (Lumens) and are easy installed when replacing old incandescent, Halogen or metal halide bulbs. Learn more about LED replacement benefits here