The following are useful resources and links:

High Efficiency High-Bay Lighting: High Wattage HID Indoor Luminaires with Electronic Ballasts (EHID)
This article published by PG&E in March 2010 discusses how new electronic ballasts allege energy savings potential and improved lamp life and performance compared to the older magnetic ballasts. Studies were conducted that evaluated the effects of replacing magnetic HID ballasts with electronic models. The results from the assessment can be found here: Read More

A Guide to State Incentives for Renewables and Efficiency
This summary table provides a snapshot of government and utility financial incentives that promote energy efficiency in the United States. This table allows viewers to quickly compare the number and types of incentives in each state. Read More

Energy Costs by State
Net generation in the United States rose 5.4 percent from September 2009 to September 2010. The National Oceanic and Atmospheric Administration (NOAA) reported that September was the fourth consecutive month with above average U.S. temperatures. Read More