A study of the combination of lamps on lighting system to control color temperature using different color fluorescent lamps

Dynamic lighting is playing a key role in education, by considering the main photometric variables such as the correlated color temperature and the illuminance to increase student’s attention levels inside the classroom. In the case of design students, the project component is fundamental for teaching, where students mainly need to develop activities such as presentation to listen to the teacher instructions, ideation and sketching to propose a solution according to the problem being addressed, and exhibition to present the work that has been done. These activities require specific and adequate lighting conditions to generate a positive impact on the performance of students. This article presents the design of a dynamic lighting system capable of adjusting the correlated color temperature in a range from 2500 K to 6500 K and the illuminance levels in a range from 0 lx to 800 lx to enhance the sustained and fixed attention of design students inside the classroom according to the type of activity that is being developed. The performance of the system was evaluated experimentally by measuring student’s attention inside the ergonomics and usability laboratory by using the Gesell chamber, the Emotiv Epoc EEG Headset with 14 electrodes to measure the brain activity and obtain engagement and focus levels, the eye tracking Tobii glasses, and a protocol to evaluate performance including several surveys and camera observation. In conclusion, the dynamic lighting system can improve the attention of design students by configuring the photometric variables according to the type of activity that is being done.

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INVESTIGASI PENGARUH TEMPERATUR WARNA BERKORELASI TERHADAP PERFORMA DSSC UNTUK SISTEM INDOOR SOLAR CELL

Jurnal Teknik ◽

10.31000/jt.v10i1.4105 ◽

2021 ◽

Vol 10 (1) ◽

Author(s):

Muhammad Khairuddin ◽

Indrawan Nugrahanto ◽

Leonardo Kamajaya

Keyword(s):

Solar Cell ◽

Light Source ◽

Color Temperature ◽

Dye Sensitized Solar Cell ◽

Pv System ◽

Dye Sensitized ◽

Fluorescent Lamps ◽

Higher Power ◽

Higher Temperature ◽

Experimental Researches

This study proposes the best light source, based on its color temperature, to be installed for indoor photovoltaic (PV) system since the light source is very significant for indoor PV system and greatly affects the performance of Dye-Sensitized Solar Cell (DSSC). In outdoor PV system, the higher temperature in the environment gives a fine impact for DSSC’s performance. However, this trend is unclear in indoor PV system. Hence, some experimental researches, such as investigating the light properties and the performance of DSSC under fluorescent lamps FL865 with CCT 6500K and FL830 with CCT 3000K, will be carried out in order to find out a preferable luminaire between two for indoor PV system. The results show that a light source, FL830, with lower color temperature is better for DSSC’s outcome in indoor use. Since the lower CCT produced higher illuminance, intensity, and radiant power that make DSSC generated 2.28% higher power than the higher CCT.Keywords: DSSC, Color Temperature, Indoor Solar Cell(Penelitian ini mengusulkan sumber cahaya terbaik berdasarkan correlated color temperature (CCT) atau temperatur warnanya untuk digunakan pada sistem indoor solar cell karena sumber cahaya sangat mempengaruhi kinerja Dye-Sensitized Solar Cell (DSSC) yang digunakan pada sistem indoor solar cell. Dalam sistem solar cell di luar ruangan, suhu yang lebih tinggi di lingkungan memberikan dampak yang baik untuk kinerja DSSC. Namun, tren ini belum jelas jika DSSC digunakan di dalam ruangan. Oleh karena itu, beberapa penelitian eksperimental, seperti menyelidiki sifat cahaya dan kinerja DSSC di bawah lampu neon FL865 dengan CCT 6500K dan FL830 dengan CCT 3000K, akan dilakukan untuk menemukan luminer yang lebih unggul untuk sistem PV dalam ruangan. Hasilnya menunjukkan bahwa sumber cahaya, FL830, dengan temperatur warna (CCT) yang lebih rendah lebih baik untuk DSSC dengan penggunaan dalam ruangan. Karena CCT lebih rendah menghasilkan iluminasi, intensitas, dan daya pancaran yang lebih tinggi yang membuat DSSC mencapai kinerja yang lebih baik dengan menghasilkan daya 2.28% lebih tinggi dari CCT yang lebih tinggi.Kata Kunci: DSSC, Temperatur Warna, Solar Cell dalam Ruangan).

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Effect of mere presence of a mobile phone on attention by different color temperature comparison

The Proceedings of the Annual Convention of the Japanese Psychological Association ◽

10.4992/pacjpa.82.0_1am-069 ◽

2018 ◽

Vol 82 (0) ◽

pp. 1AM-069-1AM-069

Author(s):

Wenjuan Liu ◽

Akihiko Kitamura ◽

Kazumitsu Shinohara

Keyword(s):

Mobile Phone ◽

Color Temperature ◽

Mere Presence ◽

Different Color

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Developing a multi-spectral imaging system using a RGB camera under two illuminations

Color and Imaging Conference ◽

10.2352/issn.2169-2629.2020.28.44 ◽

2020 ◽

Vol 2020 (28) ◽

pp. 277-281

Author(s):

Zhen Liu ◽

Kaida Xiao ◽

Michael Pointer ◽

Changjun Li

Keyword(s):

Imaging System ◽

Estimation Method ◽

Spectral Imaging ◽

Color Temperature ◽

Lighting Conditions ◽

Model Combining ◽

Rgb Images ◽

Spectra Properties ◽

Different Color ◽

Specular Highlights

This paper proposes a multi-spectral imaging system, developed using a commercial-grade camera, under two commonly used illumination. Rather than using conventional direct or diffuse light, the novelty of our method is to use a cross-polarized imaging system to eliminate glare and specular highlights. Two RGB images are captured under two different color temperature lighting conditions. An improved reflectance estimation method is developed to transform camera RGB under two illumination to spectral reflectance using a regulated model, combining the polynomial expansion of the camera signals with optimally selected feature. The method was tested using both a semi-gloss ColorChecker SG (140) and matte ColorChecker DC (240) chart. The results indicate that the proposed method significantly outperforms the traditional methods both in terms of spectra and colorimetric accuracy. This new multi-spectral imaging system is sufficiently precise to predict spectra properties and its performance within an acceptable range.

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