ARE THE DEMANDS IN ENTERTAINMENT LIGHTING TOO HIGH FOR WHITE LIGHT EMITTING DIODES?

2021 ◽  
Author(s):  
M. Nilsson Tengelin ◽  
N. Mylly ◽  
P.O. Hedekvist
Keyword(s):  
White Light ◽  
Light Quality ◽  
Lighting Design ◽  
Data Sheet ◽  
Proper Function ◽  
Light Emitting ◽  
Lighting Technology ◽  
Lighting Systems ◽  
White Light Emitting Diodes

This paper reports the result of a survey on entertainment lighting distributed to 246 museums and 56 theatres in Sweden. The questions concerned the lighting technology used, experience from changing lighting systems, plans, problems, apprehensions and expectations. The replies showed that the transition to LED has been much faster in museums than in theaters and 35% of the theatres do not plan for a transition to LED. Reasons given are economy, light quality, and dimming functionality. Lighting professionals are generally sceptical in exchanging halogen lights. The artistic expression in lighting design goes beyond the specifications and what is promised in the data sheet. To facilitate a smoother transition to modern lighting technologies, the quality of the white light and proper function of the luminaires must be ensured and the communication between the manufacturers, retailers, lighting professionals and other artistic functions must be improved.

What Color is My City?

2015 ◽  
Vol 5 (3) ◽  
pp. 4-11
Author(s):  
Adam Rogers
Keyword(s):  
Los Angeles ◽  
White Light ◽  
Sodium Vapor ◽  
Light Emitting ◽  
Lighting Technology ◽  
Artificial Lighting ◽  
History Of ◽  
Gold Sodium ◽  
White Light Emitting Diodes ◽  
The City

The city of Los Angeles is converting its streetlights from orange-gold sodium vapor technology to cold, white light-emitting diodes. It’s a transition that will change the color of the city at night, in a place with a long history of experimentation with artificial lighting technology. That means not only that the city will appear different, but it will no longer correspond to memories of its coloration, or to its depictions in famous films.

scholarly journals Green Light Exposure Improves Pain and Quality of Life in Fibromyalgia Patients: A Preliminary One-Way Crossover Clinical Trial

Pain Medicine ◽  
2020 ◽  
Author(s):  
Laurent Martin ◽  
Frank Porreca ◽  
Elizabeth I Mata ◽  
Michelle Salloum ◽  
Vasudha Goel ◽  
...  
Keyword(s):  
Quality Of Life ◽  
Clinical Trial ◽  
White Light ◽  
Light Emitting Diodes ◽  
Green Light ◽  
Pain Clinic ◽  
Mcgill Pain Questionnaire ◽  
Light Emitting ◽  
White Light Emitting Diodes

Abstract Objective Fibromyalgia is a functional pain disorder in which patients suffer from widespread pain and poor quality of life. Fibromyalgia pain and its impact on quality of life are not effectively managed with current therapeutics. Previously, in a preclinical rat study, we demonstrated that exposure to green light-emitting diodes (GLED) for 8 hours/day for 5 days resulted in antinociception and reversal of thermal and mechanical hypersensitivity associated with models of injury-related pain. Given the safety of GLED and the ease of its use, our objective is to administer GLED as a potential therapy to patients with fibromyalgia. Design One-way crossover clinical trial. Setting United States. Method We enrolled 21 adult patients with fibromyalgia recruited from the University of Arizona chronic pain clinic who were initially exposed to white light-emitting diodes and then were crossed over to GLED for 1 to 2 hours daily for 10 weeks. Data were collected by using paper surveys. Results When patients were exposed to GLED, but not white light-emitting diodes, they reported a significant reduction in average pain intensity on the 10-point numeric pain scale. Secondary outcomes were assessed by using the EQ-5D-5L survey, Short-Form McGill Pain Questionnaire, and Fibromyalgia Impact Questionnaire and were also significantly improved in patients exposed to GLED. GLED therapy was not associated with any measured side effects in these patients. Conclusion Although the mechanism by which GLED elicits pain reduction is currently being studied, these results supporting its efficacy and safety merit a larger clinical trial.

Excellent Color Quality of White-Light-Emitting Diodes by Embedding Quantum Dots in Polymers Material

2016 ◽  
Vol 22 (1) ◽  
pp. 35-41 ◽  
Author(s):  
Huang-Yu Lin ◽  
Sheng-Wen Wang ◽  
Chien-Chung Lin ◽  
Kuo-Ju Chen ◽  
Hau-Vei Han ◽  
...  
Keyword(s):  
Quantum Dots ◽  
White Light ◽  
Light Emitting Diodes ◽  
Light Emitting ◽  
Color Quality ◽  
White Light Emitting Diodes ◽  
Excellent Color

Advanced red phosphors for white light-emitting diodes

2016 ◽  
Vol 4 (37) ◽  
pp. 8611-8623 ◽  
Author(s):  
Junhao Li ◽  
Jing Yan ◽  
Dawei Wen ◽  
Wasim Ullah Khan ◽  
Jianxin Shi ◽  
...  
Keyword(s):  
White Light ◽  
Light Emitting Diodes ◽  
Low Energy ◽  
Environmental Friendliness ◽  
Light Emitting ◽  
Red Phosphors ◽  
Low Energy Consumption ◽  
Long Lifetime ◽  
White Light Emitting Diodes

White light-emitting diodes (WLEDs) with high luminous brightness, low energy consumption, long lifetime and environmental friendliness can be applied in various fields. In order to improve the quality of white light, red phosphors are necessary.

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