Optical characteristics of LED light tubes

LED provides monochromatic light with a large half-width. Since the energy gap of the semiconductor decreases with the increase of temperature, the peak wavelength it emits increases with the increase of temperature, that is, the spectrum red shifts, and the temperature coefficient is +2~3A/. The LED luminance L is approximately proportional to the forward current. As the current increases, the luminance also increases approximately. In addition, the luminance is also related to the ambient temperature. When the ambient temperature is high, the recombination efficiency decreases and the luminous intensity decreases.