<P> The Helmholtz--Kohlrausch effect influences the use of LED lights in different technological practices . Aviation is one field that relies upon the results of the Helmholtz--Kohlrausch effect . A comparison of runway LED lamps and filtered and unfiltered incandescent lights all at the same luminance shows that in order to accomplish the same brightness, the white reference incandescent lamp needs to have twice the luminance of the red LED lamp, therefore suggesting that the LED lights do appear to have a greater brightness than the traditional incandescent lights . One condition that affects this theory is the presence of fog . </P> <P> Another field that uses this is the automotive industry . LEDs in the dashboard and instrument lighting are designed for use in mesopic luminance . In studies, it has been found that red LEDs appear brighter than green LEDs, which means that a driver would be able to see red light before the green lights when driving at night . </P>

Adding more white to a color changes the color s hue. wavelength. brightness. saturation