The current state of energy efficiency and light quality of led products

Abstract

The article presents the results of the energy efficiency study and light quality of LED illuminators (lamps) for general lighting, in particular colorimetric parameters, light flux modulation and photobiological safety. It is shown that two-base LED lamps with G13 base and luminaires for outdoor lighting have achieved energy efficiency class A++. LED lamps with E27 base and indoor lighting fixtures with light diffusers have a light output 25–35% lower and correspond to energy efficiency classes A+, A, B. Correlated color temperature (FTA) of indoor lighting fixtures is mainly in the range of 3000–4500 K, and the total color rendering index Ra – in the range of 71–86 units. The deviation of chromaticity from nominal values can reach 7+ degrees of McAdam ellipses (7+ standard deviations of SDCM comparison color). The angular non-uniformity of color in luminaires with diffuse light diffusers does not exceed 3 SDCM, and for luminaires without light diffusers and with lens optics - can exceed 7+ SDCM. It is shown that LED luminaires for indoor lighting have a mainly safe level of flicker and visibility of the stroboscopic effect. In the frequency range up to 80 Hz, the flicker level, which is observed with a probability of 50% lower than incandescent lamps with a power of 60 watts. In the frequency range up to 3000 Hz, the modulation depth corresponds to a level that does not create adverse biological effects. LED lamps and illuminators for general lighting entering the lighting market do not exceed the parameters of the insignificant risk danger group of blue light RG1. Lamps and illuminators using diffuse light diffusers belong to the general group RG0 (no risk). Conclusions are made on energy efficiency and light quality of LED lamps.