Design of decentralized street LED light dimming system

To reduce power consumption due to street lighting, we propose replacing conventional power consuming High Pressure Sodium Lamps and metal Halide lamps with LED lamps which consume much less power. We also propose employing LED light dimming by modifying the light intensity based on the traffic conditions on the road. Most of the dimming systems currently deployed on the streets use computerized and remotely controlled wireless monitoring systems which suffer from complexity, high cost and a response that is dependent on the network data transfer speed. Unlike these systems, we propose, in this paper, a decentralized street LED light dimming system that is installed on each pole and whose dimming action is controlled by the dimming circuit of the pole itself. This yields faster and more reliable response. In addition, the proposed system does not need any additional infrastructure. It is scalable in the sense that it can be used in small or main streets with any number of poles, and flexible in system specifications based on the selection of the coverage distance of the designed motion detector. Simulations show the effectiveness of the proposed system and in saving energy.