One of my teachers told me that it was funded by a company. Basically, the school loaned $15 Million to this company, who replaced all the lighting (well, not all, apparently lol), retrofitted all the urinals and toilets to motion-sensor instead of manual flush, and may have made improvements to the HVAC. And the school will be paying them back over the course of X years. By the time the school pays them back it'll be time to upgrade all the lighting and HVAC again lol.