LumenCache is a DC power and control infrastructure for buildings that solves all the limitations wireless and AC powered solutions struggle to overcome. Efficiency and eWaste reduction is just the start. Simplicity, price, and reduced obsolescence make it attractive to builders. It improves compatibility between vendors and versions, and allows building technology to evolve almost as quickly as software. Start with reliable and efficient lighting to get the infrastructure installed, but that's just the beginning... It enables AI in buildings by including a tiny bit of control into every powered device. It enables demand management to help the grid transition to renewables. And it allows 5G to work indoors. LumenCache is the evolution of power and control inside buildings.