The ML-3 model is a low intensity runway light. All components are as maintenance free as possible. The 10″ Diameter cone is made of durable baked yellow enamel painted .050 aluminum. The post is electrical grade PVC which has UV Stabilization and is rust and corrosion free. The lens is UV polycarbonate and houses a 15 watt long-life bulb. The lens is available in clear, amber, red, green, and blue. There are also split lens options for red/green, red/clear, amber/clear and green/clear.