LED lights have high quality requirements

In the millions of years of evolution, the human eye has adapted to the continuous spectrum of nature, including the sun, the sky light and moonlight. Early artificial light is a continuous spectrum, such as torches, candles and oil lamps, as well as the first generation of electric incandescent and tungsten-halogen light source. With the advent of the light source of a higher luminous efficiency gas discharge, there are different degrees of discontinuous spectrum fluorescent, high pressure sodium and metal halide in people's lives, but its use is less than 80 years in human history just be a moment, not enough to affect the human eye vision from the genetic point of view. From the perspective of imitating nature, using indoor lighting continuous spectrum light source is always more natural choice.

The current mainstream blue chip LED is adopted to stimulate the yellow phosphor to produce white light in the visible region belongs to the continuous spectrum, but the green area is weak, less red light district. So the continuity LED spectrum was stronger than fluorescent lamps, but no more than ceramic metal halide lamp. General LED red special rendering index (R9) only requires> 0, you can’t restore crimson very well. So after the Great Hall with LED lighting retrofit, the red star also use halogen lamps. If you want to increase the magenta color, should increase red phosphor or red LED chip packaging device.

CRI indoor occasions is very important. If the line to the halogen lamps and ceramic metal halide lamps, LED color rendering index of 90 or more needs to be done, we also need to increase the red phosphor or red chips.

In the lifetime, color temperature and color coordinates of the light source must be stable. This LED phosphor and anti-aging properties of silica gel package makes high demands.

Spatial uniformity of color is not a problem for conventional light sources, but the LED is more difficult to resolve. Because the blue LED chips are still about one-third will be mixed into white light emitted and participation, while chip and phosphor spatial light uniformity are different, which will lead to color coordinate space offset, or even the color of white light around. This question multicolor LED intelligent lighting fixtures light mixing more serious, it is a future focus on resolving the problem.

Comfort strobe lighting also need to consider. AC LED solution is now directly point after mains rectifier LED lights, there is a frequency of 100Hz flicker, and the current zero LED does not emit light. This need to increase the capacitor filter, reduce the volatility of the depth of light.