Effects of Sidewall Brightness on LED Lighting Environment and Visual Performance in Road Tunnels
Abstract
:1. Introduction
2. Test Arrangement
2.1. Tunnel and LED Lamps
2.2. Lighting Environment Setup
2.3. Experimental Scheme
3. Tunnel Lighting Environment Parameters
3.1. Luminance and Illuminance in Tunnel
3.2. Spectral Distribution of LED Light Sources
3.3. S/P Value
4. Visual Characteristics of Human Eyes in Tunnel
4.1. Visible Distance for Small Object
4.2. Dynamic Change of Driver’s Pupil Diameter during Driving
5. Conclusions
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Conflicts of Interest
References
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Color Temperature (K) | Single Lamp Power of 10 W | Single Lamp Power of 18 W | ||||||||
---|---|---|---|---|---|---|---|---|---|---|
Sidewall Luminance (cd/m2) | Pavement Luminance (cd/m2) | Pavement Illuminance (lx) | Luminance Ratio of Sidewall to Pavement | Ratio of Illuminance to Luminance of Pavement | Sidewall Luminance (cd/m2) | Pavement Luminance (cd/m2) | Pavement Illuminance (lx) | Luminance Ratio of Sidewall to Pavement | Ratio of Illuminance to Luminance of Pavement | |
2500 | 3.6 | 2.7 | 23.0 | 1.3 | 8.5 | 6.7 | 5.0 | 41.8 | 1.3 | 8.4 |
3500 | 3.6 | 2.7 | 24.3 | 1.3 | 9.0 | 6.6 | 5.1 | 43.8 | 1.3 | 8.6 |
4500 | 3.8 | 2.8 | 24.7 | 1.4 | 8.8 | 6.8 | 5.1 | 43.8 | 1.3 | 8.6 |
5500 | 3.7 | 2.7 | 24.2 | 1.4 | 9.0 | 6.6 | 5.0 | 43.0 | 1.3 | 8.6 |
6500 | 3.9 | 2.9 | 25.6 | 1.3 | 8.8 | 6.9 | 5.2 | 47.3 | 1.3 | 9.1 |
Color Temperature (K) | Single Lamp Power of 10 W | Single Lamp Power of 18 W | ||||||||
---|---|---|---|---|---|---|---|---|---|---|
Sidewall Luminance (cd/m2) | Pavement Luminance (cd/m2) | Pavement Illuminance (lx) | Luminance Ratio of Sidewall to Pavement | Ratio of Illuminance to Luminance of Pavement | Sidewall Luminance (cd/m2) | Pavement Luminance (cd/m2) | Pavement Illuminance (lx) | Luminance Ratio of Sidewall to Pavement | Ratio of Illuminance to Luminance of Pavement | |
2500 | 1.3 | 2.1 | 17.8 | 0.6 | 8.5 | 2.1 | 3.5 | 34.3 | 0.6 | 9.8 |
3500 | 1.3 | 2.2 | 20.5 | 0.6 | 9.3 | 2.2 | 3.4 | 34.5 | 0.6 | 10.1 |
4500 | 1.4 | 2.3 | 20.8 | 0.6 | 9.0 | 2.3 | 3.5 | 34.8 | 0.7 | 9.9 |
5500 | 1.3 | 2.1 | 20.2 | 0.6 | 9.6 | 2.3 | 3.4 | 33.2 | 0.7 | 9.8 |
6500 | 1.4 | 2.2 | 22.6 | 0.6 | 10.3 | 2.3 | 3.7 | 37.1 | 0.6 | 10.0 |
Color Temperature (K) | Tunnel Sidewalls Decorated with Energy-Storage and Luminescent Coating | Tunnel Sidewalls Decorated with Gray Cloth | ||
---|---|---|---|---|
Single Lamp Power of 10 W | Single Lamp Power of 18 W | Single Lamp Power of 10 W | Single Lamp Power of 18 W | |
2500 | 0.811 | 0.808 | 0.844 | 0.836 |
3500 | 1.539 | 1.526 | 1.555 | 1.535 |
4500 | 1.572 | 1.566 | 1.584 | 1.582 |
5500 | 1.757 | 1.774 | 1.798 | 1.801 |
6500 | 2.034 | 2.036 | 2.070 | 2.058 |
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Chen, X.; Feng, S.; Li, J.; Zhou, L.; Mao, W.; Zhu, H. Effects of Sidewall Brightness on LED Lighting Environment and Visual Performance in Road Tunnels. Appl. Sci. 2022, 12, 4919. https://doi.org/10.3390/app12104919
Chen X, Feng S, Li J, Zhou L, Mao W, Zhu H. Effects of Sidewall Brightness on LED Lighting Environment and Visual Performance in Road Tunnels. Applied Sciences. 2022; 12(10):4919. https://doi.org/10.3390/app12104919
Chicago/Turabian StyleChen, Xuefeng, Shouzhong Feng, Jie Li, Long Zhou, Weixing Mao, and Hehua Zhu. 2022. "Effects of Sidewall Brightness on LED Lighting Environment and Visual Performance in Road Tunnels" Applied Sciences 12, no. 10: 4919. https://doi.org/10.3390/app12104919
APA StyleChen, X., Feng, S., Li, J., Zhou, L., Mao, W., & Zhu, H. (2022). Effects of Sidewall Brightness on LED Lighting Environment and Visual Performance in Road Tunnels. Applied Sciences, 12(10), 4919. https://doi.org/10.3390/app12104919