Application of light emitting diodes as a light source to a photosynthetic culture of Chlorobium thiosulfatophilum

1991 ◽  
Vol 5 (5) ◽  
Author(s):  
ByungWoo Kim ◽  
EunHan Kim ◽  
HoNam Chang
Keyword(s):  
Light Source ◽  
Light Emitting Diodes ◽  
Light Emitting ◽  
Chlorobium Thiosulfatophilum

Light source with light emitting diodes. Determination of limited frequencies and of the crest factor of illuminance meters and luminance meters

1989 ◽  
Vol 20 (5) ◽  
pp. 205-217
Author(s):  
J Deforges ◽  
P Garcia ◽  
J Bastie ◽  
F Marandet ◽  
J Bernard ◽  
...  
Keyword(s):  
Light Source ◽  
Light Emitting Diodes ◽  
Crest Factor ◽  
Light Emitting

scholarly journals 310 nm UV-LEDs attenuate imiquimod-induced psoriasis-like skin lesions in C57BL/6 mice and inhibit IL-22-induced STAT3 expression in HaCaT cells

2020 ◽  
Vol 19 (8) ◽  
pp. 1009-1021
Author(s):  
Tae-Rin Kwon ◽  
Sung-Eun Lee ◽  
Jong Hwan Kim ◽  
You Na Jang ◽  
Su-Young Kim ◽  
...  
Keyword(s):  
Light Source ◽  
Ultraviolet Light ◽  
Light Emitting Diodes ◽  
Skin Lesions ◽  
Hacat Cells ◽  
Light Emitting ◽  
Uv Leds ◽  
Ultraviolet Light Emitting Diodes

Ultraviolet light-emitting diodes (UV-LEDs) are a novel light source for phototherapy.

A replacement for incandescent bulbs: high-efficiency blue-hazard free organic light-emitting diodes

2017 ◽  
Vol 5 (1) ◽  
pp. 176-182 ◽  
Author(s):  
J. H. Jou ◽  
H. H. Yu ◽  
F. C. Tung ◽  
C. H. Chiang ◽  
Z. K. He ◽  
...  
Keyword(s):  
Energy Saving ◽  
Light Source ◽  
High Efficiency ◽  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
Light Emitting ◽  
Organic Light

A blue-hazard free, healthy light source will become the mainstream of future lighting wherein higher energy saving is always a must.

Cost-Effective Light-Mixing Module for Solar-Lighting System Appended With Auxiliary RGBW Light-Emitting Diodes

2017 ◽  
Vol 139 (6) ◽  
Author(s):  
An Chi Wei ◽  
Shih Chieh Lo ◽  
Ju-Yi Lee ◽  
Hong-Yih Yeh
Keyword(s):  
Light Source ◽  
Light Emitting Diodes ◽  
Cylindrical Tube ◽  
Cost Effective ◽  
Lighting System ◽  
Optical Efficiency ◽  
Light Emitting ◽  
Solar Lighting ◽  
Lighting Systems ◽  
Main Components

A light-mixing module consisting of a compound parabolic concentrator (CPC) and a light-mixing tube is proposed herein to realize a uniform and efficient solar-lighting system. In this lighting system, the sunlight collected into a fiber and then guided to an indoor destination is the principal light source, while an auxiliary light source including multiple red, green, blue, and white (RGBW) light-emitting diodes (LEDs) is controlled by an auto-compensating module. To mix the principal and the auxiliary sources and to realize the uniform illumination, the light-mixing tube was coated with BaSO4 and optimized as a cylindrical tube. The design of the light-mixing tube is described and discussed in this article. According to the simulated results, the uniformity and the optical efficiency of the designed light-mixing tube are 82.9% and 85.7%, respectively, while from the experimental results, the uniformity of 85.9% and the optical efficiency of 83.3% have been obtained. In terms of the common indoor-lighting standards and the specifications of commercial components used in lighting systems, the proposed light-mixing module has demonstrated the high uniformity and acceptable optical efficiency. Additionally, since the main components of the light-mixing module can be designed as plastic optics, a cost-effective light-mixing module and a profitable lighting system can be realized. Thus, the performance and the price of the proposed light-mixing module fit the demands of the illumination market, while the proposed system shows the potential for indoor solar-lighting applications.

Light-emitting diodes as a light source for photosynthesis research

1994 ◽  
Vol 39 (1) ◽  
pp. 85-92 ◽  
Author(s):  
Daniel J. Tennessen ◽  
Eric L. Singsaas ◽  
Thomas D. Sharkey
Keyword(s):  
Light Source ◽  
Light Emitting Diodes ◽  
Light Emitting ◽  
Photosynthesis Research

Colour-enhanced light emitting diode light with high gamut area for retail lighting

2015 ◽  
Vol 49 (3) ◽  
pp. 329-342 ◽  
Author(s):  
XF Feng ◽  
W Xu ◽  
QY Han ◽  
SD Zhang
Keyword(s):  
Light Source ◽  
Light Emitting Diodes ◽  
Spectral Power ◽  
Light Emitting Diode ◽  
Broad Band ◽  
Area Index ◽  
Light Emitting ◽  
High Preference ◽  
Colour Rendering ◽  
Colour Appearance

Light emitting diodes with high colour quality were investigated to enhance colour appearance and improve observers' preference for the illuminated objects. The spectral power distributions of the light emitting diodes were optimised by changing the ratios of the narrow band red, green and blue light emitting diodes, and the phosphor-converted broad-band light emitting diode to get the desired colour rendering index and high gamut area index. The influence of the light emitting diode light on different coloured fabrics was investigated. The experimental results and the statistical analysis show that by optimising the red, green, blue components the light emitting diode light can affect the colour appearance of the illuminated fabrics positively and make the fabrics appear more vivid and saturated due to the high gamut area index. Observers indicate a high preference for the colours whose saturations are enhanced. The results reveal that the colour-enhanced light emitting diode light source can better highlight products and improve visual impression over the ceramic metal halide lamp and the phosphor-converted light emitting diode light source.

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