On the Efficiency of Lighting by LEDs in Visual Work

Amelkina, Svetlana A.; Zheleznikova, Olga E.; Sinitsyna, Lyudmila V.

doi:10.33383/2017-099

Cited by 11 publications

(3 citation statements)

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“…On the basis of its analysis, which appears to be deep, the Committee made a conclusion on non-availability of evidences of adverse impact of LED on public health during normal use. Russian researchers draw similar conclusions [3].…”

Section: Relevancesupporting

confidence: 60%

Protective Glass in the Design of Outdoor Luminaires

Danilko,

Karev,

Lagov

et al. 2024

L&E

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In accordance with the requirements of the decree of the government (DG) of the Russian Federation, protective glass is a mandatory element of the design of utilitarian outdoor luminaries. The paper analyses the relevance of this requirement and explains the functions performed by this structural element. The protective glass of the outdoor luminaire provides significant advantages of LED outdoor lighting installations (LOLI), confirmed by analysis of the literature, calculated estimates and during experimental studies of characteristics changes during operation. Considering the identified dependencies is advisable when determining the outdoor luminaire’s maintenance and dirt depreciation factor for luminaries’ various designs.

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Section: Relevancesupporting

confidence: 60%

Protective Glass in the Design of Outdoor Luminaires

Danilko,

Karev,

Lagov

et al. 2024

L&E

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“…Thus, DIALux as a lighting design tool was considered reliable for luminous flux (lumen) delivery calculations and the model created with DIALux 4.13 was considered valid. The proposed upgradation of the fluorescent lamp-lit illumination system model considered retrofitting with light emitting diodes (LEDs) owing to their energy efficiency and overall suitability for current indoor lighting practices (Protzman and Houser, 2006;Tsuei et al, 2008;Byun et al, 2013;Amelkina et al, 2018).…”

Section: Creation and Simulation Of A Dialux Model Of Existing Illumination Systemmentioning

confidence: 99%

Simulation and analysis of the effects of room surface reflectance combinations on a proposed retrofit illumination system of an office

Roy

Majumder

Bhattacharya

et al. 2021

JEDT

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Purpose An indoor office space should not only provide adequate illuminance on horizontal planes but also cater to the physiological and psychological requirements of the occupants. This paper aims to describe a lighting simulation-based work conducted in Kolkata, India which modeled an indoor office to investigate the effects of variation in room surface reflectance combinations on user perception, mean room surface exitance (MRSE), average horizontal illuminance and overall uniformity of horizontal illuminance. Design/methodology/approach A fluorescent illumination system–based office space was modeled and retrofitted with tubular LED lamps in DIALux. Simulations were conducted for 16 different room surface reflectance combinations and a five-point Likert scale-type survey questionnaire was formulated to conduct a survey with 32 test subjects to assess the subjective preferability of each resultant light scene. Findings Simulation results demonstrate that the relationship between average horizontal illuminance and MRSE as well as between average horizontal illuminance and overall uniformity of horizontal illuminance, was statistically significant (p < 0.001). In the conducted survey, the resultant light scene arising out of the reflectance combination of wall:ceiling:floor = 60%:90%:20% was the most well-received one with 187 convinced agreements (“agree” and “strongly agree” responses). Originality/value This work found strong linear correlation between average horizontal illuminance and MRSE and between average horizontal illuminance and overall uniformity. A five-point Likert scale-type survey questionnaire with seven questions was formulated and validated with 32 test subjects (Cronbach’s alpha > 0.9295), which showed that the wall:ceiling:floor reflectance combination of 60%:90%:20% was the most favored choice.

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“…LED luminaires were chosen for this work as LED technology is widely used for both indoor (Sinnadurai et al , 2012; Wang et al , 2017) and outdoor lighting purposes, including vehicular lighting, area lighting, road lighting simulation and analysis (Khan et al , 2015; Bhattacharya et al , 2021; Roy et al , 2022). LED luminaires are more energy-efficient compared to fluorescent light generation technology, highly conducive to different visual tasks, may not adversely affect body rhythm and health (van Bommel, 2011) and are generally considered to be highly suited for indoor lighting applications (Tsuei et al , 2008; Bhattcharjee and Mazumdar, 2016; Amelkina et al , 2018).…”

Section: Introductionmentioning

confidence: 99%

The effects of lamp types and surface reflectance combinations on the subjective perception of a simulated lit hospital ward environment

Roy

Satvaya²

2022

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Purpose Good illumination creates an aesthetic environment that may positively influence patients’ well-being and provide comfort to the hospital staff. This study aims to focus on exploring the energy efficiency of lighting and subjective perception of the lit environment in a hospital ward to assess quality indicators of ambient lighting conditions. Design/methodology/approach The existing conventional tubular fluorescent lamp–based lighting system in the surveyed patients’ ward was retrofitted with light-emitting diode (LED) luminaires to explore illumination and energy parameters. Thereafter, a software lighting model was created, simulated and analyzed. A Web-based survey with five bipolar adjective pairs in a semantic differential scale was conducted with 48 participants to record and analyze their subjective responses pertaining to the variations in lamp types and surface reflectance combinations. Findings The findings imply that the LED tubular lamp–based illumination was deemed more adequate compared to other lamp types and the effects of variations in room surface reflectance combinations on the participants’ responses were statistically significant at α = 0.05 level. The simulated horizontal work plane average illuminance level varied from 131 to 171 lx, mean room surface exitance (MRSE) levels remained between 30 and 90 lm/m2 and overall uniformity of illuminance remained between 0.5 and 0.7. Originality/value In a hospital ward illuminated by LED tubular lamps, variations in room surface reflectance combinations for a constant luminous flux package output from the lamps may affect the subjective perception of users and the correlation between horizontal work plane average illuminance and MRSE is found to be highly linear (coefficient of determination > 0.97).

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On the Efficiency of Lighting by LEDs in Visual Work

Cited by 11 publications

References 0 publications

Protective Glass in the Design of Outdoor Luminaires

Protective Glass in the Design of Outdoor Luminaires

Simulation and analysis of the effects of room surface reflectance combinations on a proposed retrofit illumination system of an office

The effects of lamp types and surface reflectance combinations on the subjective perception of a simulated lit hospital ward environment

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