The Business Academy Bexley, a public school in London, has been upgraded with 8point3 LED lighting and Lutron adaptive wireless controls. The school reduced its lighting energy costs by 60%, which resulted in an annual savings of EUR 25,000 ($34,860). A seven-year financing scheme allowed zero upfront cost for the project.
Daylight is free, and many spaces inside buildings are daylit, yet electric lighting is left on unnecessarily. Daylight harvesting harnesses this free, natural light, using such building control system strategies as light sensing, occupancy sensing, and shade control, while automatically adjusting the energy use of HVAC and electric lighting systems.
The results? Reduced overall energy costs, coupled with healthy and productive working environments. Daylight harvesting technologies include photocells, occupancy sensors and centralized or distributed control systems. The strategy can be implemented during building design and planning or even retrofitted flexibly at a later time. Continue reading