Mercury vapor lamps are a type of high intensity discharge (HID) lamp that is less efficient than the now widely used metal halide and high pressure sodium lamps.  However, these mercury vapor lamps continue to be used, both in existing fixtures and in some applications where the lower cost of mercury vapor lamps and ballasts are attractive ...

The Motor Generator section of the National Electrical Manufacturers Association (NEMA) recently joined forces with the American Council for an Energy Efficient Economy (www.aceee.org/) to draft and recommend new motor efficiency regulations covering both general purpose and some categories of definite and special purpose electrical ...