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3.4 LED drive mode
LED is generally constant voltage or constant current drive, in Figure 3.2 LED current characteristic we can see that, as the voltage of the LED current changes particularly large, and the current as the voltage variation is relatively small. Therefore, the drive mode LED constant current drive should be selected to ensure that current does not change, so the stability of LED circuit is relatively high.
Solar Lighting System of Highway Tunnel
First, the purpose and significance of research projects
Because many of the mountain, a vast territory, in order to shorten the highway mileage, improve transport efficiency, save space and maintain the ecological environment, more and more attention in highway construction tunnel construction. Highway tunnel has its particularity function to determine the complexity of its construction. Tunnel lighting system is one of the most important mechanical and electrical engineering facilities, but also the entire tunnel mechanical and electrical engineering a total investment of one of the largest systems. Highway tunnel lighting, regardless of day or night is very important, and the problem is more complex lighting during the day than at night. In order to meet the operational requirements of highway tunnel, tunnel lighting should be adapted to the characteristics of highway tunnels, energy conservation, improve the lighting effect, ensure traffic safety, comfort, operational management can be performed efficiently.
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Letect Electronic Technology Co., Ltd
solar light manufacturers, solar lantern manufacturers, solar lights china, solar garden lights
Address: Ningbo Industrial Park, Ningbo City, Zhejiang Province, China,
NINGBO, ZHEJIANG
China,
Tel: 0086-574-23459876
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