The Future of Interior Lighting Is Here

Doulos, Lambros T.; Tsangrassoulis, Aris

doi:10.3390/su14127044

Cited by 5 publications

(5 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The luminaire is constructed of ecologically friendly materials, achieves a maximum luminous efficacy of 81 lm/W and its maximum power consumption is relatively low (about 40 W). Thus, it encompasses a variety of advantages and can be integrated in a sustainable lighting system with ambient light sensors [15] and occupancy sensors, so as to implement a holistic lighting design approach which aims at both visual comfort [16][17], optimization of circadian effects, minimization of energy consumption [18][19] and minimum environmental impact in overall [20][21]. Another conclusion is that all manufacturers of lighting equipment should provide the respective values of MDER, MEER and CS in the datasheets of luminaires, so as to inform the customers and the lighting designers about the circadian effects of their lighting products.…”

Section: Resultsmentioning

confidence: 99%

Design and Development of a Sustainable Environmentally Friendly and Human Centric Luminaire

Madias

Patrikios

Grigoropoulos

et al. 2022

IOP Conf. Ser.: Earth Environ. Sci.

View full text Add to dashboard Cite

Apart from the visual effects, light can also affect the human non-visual system, which includes a wide range of functions such as hormone secretion, alertness, mood etc. The non-image forming effects occur because light affects melanopsin, a photosensitive protein present in the receptive domain of retinal ganglion cells. These cells are responsible for generating nerve impulses that regulate the secretion of two hormones, cortisol and melatonin. Low-wavelength light at 460-480 nm inhibits melatonin secretion and activates brain activity. Aim of this paper is to create a sustainable and human centric luminaire suitable for office installations that will regulate the biological rhythm of the occupants and has the minimum environmental impact. The luminaire’s light source emits variable spectrum, with a collated colour temperature varying between 2700K and 6500K. For a 500K step of colour temperature values, the appropriate human centric lighting metrics are calculated: Equivalent Melanopic Lux, Melanopic Daylight Equivalent Illuminance, Circadian Stimulus. The development of the human centric luminaire considers not only the metrics of human centric lighting but energy efficiency and visual comfort as well. Conclusively, the proposed luminaire can provide a holistic approach to lighting design so as to integrate both visual and non-visual effects and produce sustainable and environmentally friendly lighting.

show abstract

Section: Resultsmentioning

confidence: 99%

Design and Development of a Sustainable Environmentally Friendly and Human Centric Luminaire

Madias

Patrikios

Grigoropoulos

et al. 2022

IOP Conf. Ser.: Earth Environ. Sci.

View full text Add to dashboard Cite

show abstract

“…The artificial lighting gains a huge attention the last years [24] and represents a significant part of the total energy consumption of the building sector [25][26][27]. The long term goals for the achievement of a climate-neutral European Union [28] draws the attention of the lighting industry manufacturers to the energy efficiency of luminaires [29].…”

Section: Discussionmentioning

confidence: 99%

Circadian stimulus calculators as environmental building design tools: Early results of a critical review

Kotsenos

Madias

Topalis

et al. 2022

IOP Conf. Ser.: Earth Environ. Sci.

View full text Add to dashboard Cite

Lighting is a hugely important aspect of the environmental building design. During the past decades the building industry has been primarily concerned with the illuminance and the energy efficiency part of the artificial lighting rather than the human health. Latest studies emphatically state that a proper lighting design and luminaire types should promote the circadian rhythm. In the present study the differences between two available Circadian Stimulus CS calculator algorithms are identified. More analytically the CS calculators are applied to a number of measured spectral power distributions (SPD) of a commercial tunable white LED luminaire (2000K-6500K). The different impact between the CS calculators for the same measured spectral power distributions is concluded through the evaluation and comparisons of the results. The different results of the CS estimations for the same SPD could affect significantly the circadian lighting design and the proper selection of a luminaire.

show abstract

“…Smart lighting technology that provides beneficial light to humans by reflecting the characteristics of natural light is emerging [1][2][3]. Natural light provides the ideal light to recognize the natural color of objects and is most beneficial to human health [4].…”

Section: Introductionmentioning

confidence: 99%

CRI-Based Smart Lighting System That Provides Characteristics of Natural Light

Oh,

Lim

2023

Information

View full text Add to dashboard Cite

Natural light continuously changes its correlated color temperature (CCT) from sunrise to sunset, providing the best color reproducibility and healthy light. In the lighting field, efforts have been made to improve the Color Rendering Index (CRI) to provide light quality at the same level as natural light. A unique light source technology that mixes and controls multiple LED light sources with different spectral or CCT characteristics or provides a high color rendering index has been introduced. However, the characteristics of natural light, which provide high CRI light while changing color temperature every moment, could not be reproduced as they were. Therefore, in this paper, we propose a CRI-based smart lighting system that reproduces natural light characteristics, provides light with high color reproducibility, and maintains homeostasis even under the changing environment of natural light CCT. After extracting the CCT for each day from the characteristics of measured natural light, the light with the highest CRI under the CCT condition for each hour was provided through a CRI-based CCT matching algorithm. Performance evaluation was conducted for four-channel LED experimental lighting. For each clear and cloudy day, daily natural light was reproduced with a light quality higher than average CRI 98 within the MAE range of CCT 6.78 K.

show abstract

The Future of Interior Lighting Is Here

Abstract: One word that characterizes the situation in the lighting industry during recent years is “change” [...]

Cited by 5 publications

References 34 publications

Design and Development of a Sustainable Environmentally Friendly and Human Centric Luminaire

Design and Development of a Sustainable Environmentally Friendly and Human Centric Luminaire

Circadian stimulus calculators as environmental building design tools: Early results of a critical review

CRI-Based Smart Lighting System That Provides Characteristics of Natural Light

Contact Info

Product

Resources

About