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 mains led lights 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 high bay light to the 4465, which makes the LED lamps can be more light is concentrated in the local area.
Three lamp power and luminous efficiency are relatively similar, so the highlights of the Cree LED application is not on the energy-saving and high brightness. In fact, the Cree mains led lights 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.
In short, the Cree mains led lights can increase the contrast of art and the surrounding wall, the color of the art look more distinctive. Table II a brief description of the different lamps caused by different light conditions. Art in the top of the wall, as opposed to 23W fluorescent lamps, Cree LED, the average vertical illumination reduces, it will be more light is concentrated in the surface of the artwork. Able to analyze the contrast on the CFL is only 0.5, while the LED lights to contrast 1.9, which greatly enhanced the art lighting effects.