I enjoy stories like this.<p>- Iteration of a product to continuously improve the system while reducing costs.<p>- Realizing that a users choice can make the system more efficient (using lower wattage cfl bulbs) and <i>acting</i> on that.<p>- Second derivative waste product used to provide 500 additional jobs.<p>- Realizing that once you have a customer channel open they are susceptible to additional sales of a different nature (soaps, etc).<p>- Generic product improvements on the side to help manage core business (cheap smart card readers)<p>- Environmental goodness<p>Lean product development in a lean environment. Well played.