通过测试15个白光LED球泡灯的光谱分布及蓝光危害值、色温、功率、光效等参数,研究了灯源的蓝光危害值与光谱结构的关系,计算了叠加单色光光谱后新光谱结构的蓝光危害值。结果表明在长波段和短波段同时叠加两个不同幅值的单色光光谱时,可以得到色温基本保持不变、蓝光危害值降低的光谱结构光源,其显色指数得以提高,但光效变化略有降低,实现了通过优化光谱来降低白光LED球泡灯蓝光危害值、提高光源显色指数的目的。

We study the relationship between the blue light hazard value and spectral structure of a light source by measuring the spectral distributions of 15 white LED bulbs and various parameters such as the blue hazard value, color temperature, power, and luminous efficiency. A numerical method is employed to calculate the blue light hazard value of the new spectral structure which is formed by superimposing a monochromatic light spectrum on the spectrum of the original sources. The results demonstrate that the color temperature of the light source remains effectively unchanged when two monochromatic light spectra with different amplitudes are superimposed on both long- and short-wavelength bands; however, the blue light hazard value is reduced, and the color rendering index is increased; further, the luminous efficiency of the light source is slightly reduced. Subsequently, the reduction of the blue light hazard value can be realized using the spectral superposition method, which can simultaneously improve the color rendering index of the light source.