Craig’s Lighting Control Whitepapers

Daylighting is going mainstream and daylight harvesting, the energy-saving lighting control strategy that actually makes daylighting “sustainable,” is beginning to catch up. 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 [...]

In July 2009, the Department of Energy issued new energy efficiency standards for commercial general-service fluorescent lamps and incandescent (and halogen) reflector lamps. The new rules take effect July 14, 2012 and will basically eliminate products with the lowest efficiency and lowest cost. In the case of fluorescent lamps, equivalent-performance products are readily available, such [...]

The Lighting Controls Association recently published a whitepaper I wrote about a new California Lighting Technology Center (CLTC) study on bilevel occupancy sensors. CLTC studied control strategies in eight private offices and found that combining occupancy sensing and bilevel switching produced the highest energy savings—about 50% more than using an occupancy sensor alone. These are [...]

Earlier this month, I posted a new whitepaper at the Lighting Control Association website that talks about the findings of a new study about combining occupancy sensing and bilevel switching. According to the Advanced Lighting Guidelines, occupancy sensors in private offices can produce up to 45% energy savings. A 2002 study by ADM Associates found [...]

In this post, I noted that ASHRAE Standard 90.1-2004 has been established by the Department of Energy as the commercial building reference standard for state building energy codes starting in 2010. Meanwhile, the stimulus package appears to be encouraging adoption of the latest version, which is 90.1-2007, as noted in this post. I promised a [...]