US-based LED lighting manufacturer LEDtronics has completed a significant eco-friendly pendant lighting project at the Pasadena Central Library in California.
The new eco–friendly pendant lighting project is expected to save the City of Pasadena thousands of dollars. Pervaiz Lodhie, CEO of LEDtronics, stated that every light at the library that the company replaced was using 900 watts of ballasted power consumption, which was reduced up to 90%. This was possible not only because of the LED lighting in the pendant fixtures, but also because of the low heat they generate. The low heat helps the room temperature to be dramatically reduced so as to save on the air–conditioning cost.
The historical pendant lighting fixtures located in the main common areas of the library were important to retain. Upon consultation with LEDtronics, a high–power LED cluster designed for retrofit into the pendant fixtures was implemented, without compromising the library’s historical integrity. The library’s 900–watt, energy–inefficient metal–halide lighting was replaced in each pendant fixture by a 95–watt LED cluster product.
The major concern for the Pasadena Central Library and the city was to reduce burdensome maintenance and power consumption costs as well as to improve the quality of lighting. Since the old metal–halide bulbs were buried within the library fixture's pendant bowl, most of their lumen production was being dampened, and whatever light intensity was left was inefficiently bouncing off the upper reflector surface of the pendant fixture to create ambient lighting for the library patron areas. By having the newly installed 95–watt LED cluster of light project upwards from the top of the pendant bowl directly into the upper reflector surface, the library actually achieved higher task area footcandle measurements than with the use of the old bulbs. In addition, there was a 17–watt LED lamp placed at the top of the pendant fixtures to produce required uplight to the high ceiling above the pendant lamps.
The City of Pasadena decided on the project partly due to the success of the LEDtronics–manufactured LED ceiling panels installed two and a half years ago in the downstairs document room at the library. The 40–watt LED ceiling mount panels replaced the old 90–watt ballasted fluorescent fixtures, during the course of a refurbishment project in mid–2008. Ever since, the LED panels have been operating continuously for at least eight hours per day, a minimum of five days per week.