Nominal risk analysis of the blue light from LED luminaires in indoor lighting design

Optik ◽  
2020 ◽  
Vol 223 ◽  
pp. 165599
Author(s):  
David Baeza Moyano ◽  
Silvia Baeza Moyano ◽  
Miguel Gómez López ◽  
Alejandro Salcedo Aznal ◽  
Roberto Alonso González Lezcano
Keyword(s):  
Risk Analysis ◽  
Blue Light ◽  
Lighting Design ◽  
Indoor Lighting

scholarly journals Towards a Sustainable Indoor Lighting Design: Effects of Artificial Light on the Emotional State of Adolescents in the Classroom

2020 ◽  
Vol 12 (10) ◽  
pp. 4263 ◽  
Author(s):  
David Baeza Moyano ◽  
Mónica San Juan Fernández ◽  
Roberto Alonso González Lezcano
Keyword(s):  
Blue Light ◽  
Emotional State ◽  
Spectral Composition ◽  
Lighting Design ◽  
Artificial Light ◽  
Visual Effects ◽  
Light Emitting ◽  
Interior Lighting ◽  
Indoor Lighting ◽  
Research Show

In recent years, articles have been published on the non-visual effects of light, specifically the light emitted by the new luminaires with light emitting diodes (LEDs) and by the screens of televisions, computer equipment, and mobile phones. Professionals from the world of optometry have raised the possibility that the blue part of the visible light from sources that emit artificial light could have pernicious effects on the retina. The aim of this work is to analyze the articles published on this subject, and to use existing information to elucidate the spectral composition and irradiance of new LED luminaires for use in the home and in public spaces such as educational centers, as well as considering the consequences of the light emitted by laptops for teenagers. The results of this research show that the amount of blue light emitted by electronic equipment is lower than that emitted by modern luminaires and thousands of times less than solar irradiance. On the other hand, the latest research warns that these small amounts of light received at night can have pernicious non-visual effects on adolescents. The creation of new LED luminaires for interior lighting, including in educational centers, where the intensity of blue light can be increased without any specific legislation for its control, makes regulatory developments imperative due to the possible repercussions on adolescents with unknown and unpredictable consequences.

Indoor Lighting Design Incorporating Human Psychology

1998 ◽  
Vol 41 (3) ◽  
pp. 113-124 ◽  
Author(s):  
Albert T.P. So ◽  
L. M. Leung
Keyword(s):  
Lighting Design ◽  
Human Psychology ◽  
Indoor Lighting

A step towards the optimization of the indoor luminous environment by genetic algorithms

2015 ◽  
Vol 26 (5) ◽  
pp. 590-607 ◽  
Author(s):  
B. Mattoni ◽  
P. Gori ◽  
F. Bisegna
Keyword(s):  
Energy Efficiency ◽  
Genetic Algorithms ◽  
Cost Effectiveness ◽  
Energy Performance ◽  
Lighting Design ◽  
Luminous Flux ◽  
Light Sources ◽  
The Cost ◽  
Indoor Lighting ◽  
Optimal Configurations

Buildings are heavily responsible for energy consumption and CO2 emissions. Increasing their energy efficiency is in the direction of the EU strategies; and this is consistent with EU Energy Performance of Buildings Directive (EPBD 2010/31/EU), 2010. In this view the design and management of daylight and artificial light can play a fundamental role. In this paper, a method to optimize indoor lighting design from energy efficiency, economic and environmental viewpoints is presented. The optimization was developed through the Genetic Algorithms technique and the optimal layout in terms of number, location and mounting heights of luminaires in a generic office room was evaluated. Solutions with different types of light sources, nominal luminous flux and photometric distribution curves were compared and the cost effectiveness of these alternatives was also considered. The systems resulting from the optimization show increased uniformity of illuminance, a reduction of the number of luminaires and a decrease of the maximum UGR values, proving the effectiveness of the technique in the lighting design field. Results show that current methods for lighting design can still be improved to achieve optimal configurations in terms of energy efficiency and cost effectiveness.

scholarly journals A New Trend for Indoor Lighting Design Based on A Hybrid Methodology

2020 ◽  
Vol 7 (2) ◽  
pp. 137-153
Author(s):  
Fathalla Selim ◽  
◽  
Samah Mohammed Elkholy ◽  
Ahmed Fahmy Bendary ◽  
◽  
...  
Keyword(s):  
Lighting Design ◽  
Indoor Lighting ◽  
Hybrid Methodology

Design & Development of a Solar Powered, CCT changing R-B-W LED Based Artificial Window

2018 ◽  
pp. 191-198
Author(s):  
Basudeb Das ◽  
Asit Kumar Sur ◽  
Saswati Mazumdar
Keyword(s):  
Light Output ◽  
Well Being ◽  
Lighting Design ◽  
White Led ◽  
Design Development ◽  
Visual Effects ◽  
Night Time ◽  
Solar Powered ◽  
Indoor Lighting ◽  
Dynamic Lighting

The concept of Artificial Window is being applied in indoor lighting design since couple of years and is easily available in market, but the main drawback of these artificial windows is their constant CCT (Correlated Colour Temperature) light output. The developed artificial window is a CCT changing system, which follows the preset pattern of daylight CCT throughout the day. It will very effective for those, who stay in a window­less room or a closed room. It is known that light not only has the visual effects but also has photo­biological effects. A dynamic light is very helpful in well being, positive mood, increased concentration, alertness consequently increased productivity. The developed system is solar powered at daytime; this window is powered by the SPV module directly without using battery. A small battery is being charged simultaneously which powers the system at night time. The window is made using two types of coloured LEDs: Red and Blue and Warm White LED. The new concept of dynamic lighting provides a very wide CCT range from 2300 K to 10800 K.

The influence of indoor lighting with low blue light dose on urine 6-sulphatoxymelatonin concentrations and sleep efficiency of healthy volunteers

2014 ◽  
Vol 46 (1) ◽  
pp. 137-145 ◽  
Author(s):  
Katarína Stebelová ◽  
Ľuboš Molčan ◽  
Monika Okuliarová ◽  
Peter Hanuliak ◽  
Peter Hartman ◽  
...  
Keyword(s):  
Healthy Volunteers ◽  
Blue Light ◽  
Sleep Efficiency ◽  
Light Dose ◽  
Indoor Lighting
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