Often the first option to going solar is reducing the KWH needed at your location. Lighting especially in commercial locations is a very high use of KWH. Retrofitting the lighting to LED can save hundreds or thousands of KWH and therefore lets you put a smaller solar system in. The payback for solar is 7-9 years, the payback on lighting can be as little as 8 months. There are utility rebates available from some utilities to offset the cost of installing LED for business. LED lighting not only sales KWH and money but also brightens up a location.