The document describes ReadyTrace's VariLux Street Light Dimmer solution for reducing cities' electricity costs from street lighting. It dimms street lights based on pre-programmed profiles to save up to 50% on costs while addressing concerns about carbon footprint and light pollution. The solution involves replacing photocells with dimmers that install in 5 minutes and are controlled via sub-audible signals broadcast over existing AM radio stations. It provides energy savings, payback periods of 1-3 years, and lifetime cost savings through flexible dimming and tracking of bulb depletion.