Daylight harvesting’s value proposition is fairly simple: As daylight levels increase in a space, electric light levels can be automatically reduced to maintain a target task light level and save energy. All automatic daylight harvesting control systems need a device that can measure light levels and signal a controller to dim or switch the lights in response to daylight contribution. This device is called a photosensor. The photosensor is a small device that can include a light-sensitive photocell, input optics and an electronic circuit used to convert the photocell signal into an output control signal, all within a housing and with mounting hardware.
WattStopper has launched the RT-200 Astronomical Time Switch, augmenting the company’s already extensive line of energy-efficient residential lighting controls. The new user-programmable time switch turns lights, or other electrical loads, on and off relative to dusk or dawn, or at selected times of day, providing energy savings and security both inside and outside the home. It is compliant with the requirements of California’s Title 24-2008 for outdoor lighting control.
WattStopper has participated in a ground-breaking demonstration of solid-state lighting (SSL) technology combined with occupancy sensors in grocery store freezer cases. The project was supported under the U.S. Department of Energy (DOE) Solid-State Lighting GATEWAY Technology Demonstration Program. WattStopper contributed FS-705 Wide Angle PIR occupancy sensors to the project.
Cherokee Investment Partners, a private equity fund managing institutional capital to acquire environmentally impacted properties, recently challenged itself to oversee construction of a sustainable residential project that, to prospective owners, would look and feel like a traditional home. The Raleigh, North Carolina project, dubbed the National Homebuilder Mainstream GreenHome, includes energy saving occupancy and vacancy sensors and time switches from Watt Stopper/Legrand throughout the home.
WattStopper has published a comprehensive catalog for its new Digital Lighting Management product line. Digital Lighting Management (DLM) is an all-digital suite of plug-together lighting controls that automatically configure to the most energy-efficient sequence of operation based on which system components are installed. The result is that DLM meets and exceeds energy code requirements, saves more energy than conventional controls, and provides an unprecedented return on investment for both new construction and retrofit projects.
Watt Stopper/Legrand has developed a new relay panel to provide fail-safe emergency lighting in a variety of commercial settings. The Emergency Relay Panel option is UL924 listed for use on emergency circuits. It is available as an option with Watt Stopper’s 24 or 48 relay size Lighting Integrator (LI) low voltage lighting control panels.
An additional 30-80 percent energy savings using occupancy sensors and 10-30 percent savings using daylighting controls can be achieved in a hi-bay fluorescent upgrade.
Watt Stopper/Legrand’s Digital Lighting Management (DLM) is an all-digital suite of plug-together lighting controls that automatically configures to the most energy efficient sequence of operation based on components in the system. The result is that DLM meets and exceeds energy code requirements, saves more energy than conventional controls, and provides an unprecedented return on investment for both new construction and retrofit projects.