Rosslyn, Va.-based National Electrical Manufacturers Association (NEMA) has published BL 2-2009, "Energy Efficiency for Electronic Ballasts for T8 Fluorescent Lamps." The standard was developed by ...

In part 1 we discussed rectifying the ballast AC current to DC and we showed an open load protection circuit. Direct replacement of fluorescent tubes with LED assemblies can lead to uneven lighting.

A new standard contains energy-efficiency requirements for evaluating electronic ballasts designed for use with 4-ft, 32-W T8 fluorescent lamps. The National Electrical Manufacturers Association (NEMA ...

To comply with new laws on reducing energy usage, fluorescent and HID lighting systems — both examples of arc discharge lamps — have become more complex and varied in their performance. To understand ...

With the rapid development of high brightness LEDs, SSL (Solid State Lighting) is no longer a niche market. In commercial buildings and department stores LED fixtures are chosen over fluorescents ...