Last week, we took a look at fluorescent lighting, which is dramatically reducing our energy use for illuminating indoor spaces. This week, we'll cover mercury vapor lighting, which is the most common ...

Users can easily reduce energy usage with dimmers. Dimming technology has evolved considerably over the last decade, especially in the arc discharge lamp category. What began as a device for simply ...

More than 105 million high-intensity discharge (HID) lamps, ranging from 20W to 2,000W in size, are now in use in a broad range of interior and exterior applications in the United States. HID lighting ...

The electronic ballast circuit block diagram (see Fig. 1) includes the ac-line input voltage (typically 220 Vac/50 Hz or 120 Vac/60 Hz), an EMI filter to block circuit generated switching noise, a ...