Boston based Lighting Efficiency Company

Digital Lumens introduced a wireless sensor and software controlled LED lighting system for commercial lighting installations that it claims will reduce energy use by up to 90%. 

Each "Intelligent Light Engine" has a built-in on-board computer – as well as sensors and wireless mesh networking capabilities that share key information across the system.

The Intelligent Light Engines form a Smart Light Grid – a lighting network – that enables all fixtures in the system to communicate with each other, respond to a neighboring fixture's state and/or system-wide programming, and provide usage and occupancy data to the Light Rules management system.

http://www.digitallumens.com/2010/03/digital-lumens-enters-led-lighting-market-with-game-changing-approach-to-energy-efficiency/

http://www.digitallumens.com/2010/03/a-radical-approach-to-energy-efficiency/