Effect of photometric detector spectral response quality on white LED spectral mismatch correction factors

Abstract

Light-emitting-diode (LED)-based solid-state lighting has become a real option for private and public lighting after achieving high total luminous flux (TLF) and luminous efficacy levels, thus promoting the development of energy efficient use regulation to be fulfilled by LED lamps and LED luminaires. Here, we propose a photometer-quality-based fast-checking criterion. This allows photometric technicians to perform a quick evaluation of the photometric head spectral response quality effect on the LED source spectral mismatch correction factor-when determining the TLF and luminous efficacy minimum approved levels-performance parameters subject to mandatory verification by the conformity assessment procedures technically supporting the corresponding regulation. The proposed criterion applies for a wide range of photometric detector heads' qualities (2.6%≤f1'≤36.4%).

Assessment of Outdoor Lighting: Methods for Capturing the Pedestrian Experience in the Field

“…The accuracy of the Hagner S4 universal photometer is stated to be better than ±3% for all common light sources. To get more precise measurements, a spectral mismatch correction factor could be applied, to compensate for the spectral mismatch between the measured light sources and incandescent light, for which the photometer is calibrated [74]. However, since the light sources evaluated in this study have similar Spectral Power Distribution, SPD (Figure 3), the inaccuracy of the measurements may be assumed to be similar.…”

Evaluación de TCC de fuentes LED mediante la reconstrucción de su espectroelectromagnénico empleando un SoC y sensor de 8 canales

“…(5) (6) (7) La constante k es calculada considerando la distribución espectral relativa S(λ) de la fuente de luz.…”

“…De manera general, la ecuación que relaciona una cantidad radiométrica dada Xe,λ (λ) a su correspondiente cantidad fotométrica XV es dada como [3]: describe la desviación de la responsividad espectral relativa de un fotómetro Srel(λ) con respecto a la función de eficiencia luminosa fotópica V(λ). En estudios se estima un rango entre 0.6% a 9% [6] para los valores de f1, mientras que en [7] el rango se encuentra entre 2.6% al 36.4%. La variación del f1 ocasiona que exista una variabilidad en las magnitudes fotométricas, por este motivo, la mejor aproximación de los valores es conocer el espectro radiante y en conjunto con la curva teórica V(λ), realizar los cálculos correspondientes para la magnitud de interés.…”

Influence of the Adaptation of Balconies to Loggias on the Lighting Climate inside an Apartment Building under Cloudy Sky

“…Various measurement procedures can be found in the literature and can also be affected by the influence of different photometric observers on the accuracy of the lux meter [57], the spectral correction of the detector used to measure the illumination [58], the register for evaluating the general photometric performance of photometers [59], and the relationship between measurement error and photometer power index [60]. Using artificial lighting influences of the quality of the spectral response of the photometric detector on the correction factors of the spectral mismatch of the white LED [61]. In Slovakia, the standarď CSN 12464-1 applies to the lighting of workplaces [62].…”