Acuity Brands, Inc. offers its Visual Economic Tool, a free, web-based design tool that uses recommended industry practices to simultaneously estimate and compare the life-cycle costs of up to three lighting systems. Users can choose to perform energy-only estimates or input additional information to create estimates that include maintenance, lighting controls and HVAC data. The resulting calculated costs can include economic return as well as life-cycle costs, net present value, and internal rate of return. Users can input data from any products within the Acuity Brands interior and exterior lighting product portfolio or even data from non-Acuity Brands lighting products. The tool has the flexibility to compare lighting systems using various lighting controls methods and common light sources, including LED, metal halide and fluorescent.