traditional lighting with LED lighting performance analysis

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In 2001, BPA art projection lamp replacement as an energy project, with the 15W and 23W compact fluorescent lamps (CFL) replace PAR38 halogen lamps. The GATEWAY show compared the optical performance of the Career PAR3812WLED lights with two types of CFL, such as light intensity, power, energy consumption, and life. Although the CFL than Cree PAR3812WLED issued more light, LED light distribution is quite narrow, reducing the intensity of the art top of the wall, light can be gathered in the works of art. And relative to 23WPAR38 and 15WR30CFL vertical between the LED to increase art and wall lighting contrast.

GATEWAY Project goals include improving the visibility of the hall, art, showing works of lighting quality, and the new LED replacement lamp lighting appearance. BPA is also concerned about this new technology, energy consumption and cost saving potential, and the Pacific Northwest National Laboratory (the PNNL) cooperation, the report analyzes the lighting performance before and after the lighting retrofit.

, LED lights with CFL showing the effect of contrast

Table 1 Comparison between CFLs and underwater led lights lights. Two different types of CFL lamps were installed in different locations of the hall. The divergence angle of the two fluorescent lamps are more than 110 °, while the Cree LED is only 18 °. The optical density of the center beam of LED products is significantly larger than the fluorescent lamps is much higher, fluorescent 300, while the LED to the 4465, which makes the LED lamps can be more light is concentrated in the local area.

CFL s spectrum in the long-wavelength red range is weak, compared to halogen or LED lights, which appear to be biased in favor of the yellow-green. Cree LED can provide better light quality, and the halogen incandescent lamp spectrum, with a high color rendering index. Color rendering index, two CFL s index of 82, two Cree LED 93 Cree LED lights will be more in the red spectral region of the long-wavelength energy distribution.

Three lamp power and luminous efficiency are r elatively similar, so the highlights of the Cree led lights for homes application is not on the energy-saving and high brightness. In fact, the Cree LED lumen output is only a little more than half of 23W compact fluorescent lamps. It has the advantage that the beam in a small conical body, especially for local lighting. Cree LED lights will emit less light in the wide-angle region.