As the solid-state lighting technology matures, the quality of this lighting is very conducive to use in tunnels. Compared with commonly used outdoor lighting products, LED lighting has excellent color rendering. Road users and pedestrians attach great importance to light quality. Some cities and pu... read more
At present, traditional high-pressure gas discharge light sources (HID), such as high-pressure sodium lamps (HPS) and metal halide lamps (MH), are still the main force of tunnel lighting. The tunnel lighting scheme requires a high minimum illuminance to provide a safe environment for users. The lumi... read more
In the vast majority of outdoor lighting applications, LEDs have proven their advantages. For tunnel applications, the point source integrated in the solid-state lighting device is particularly matched. In this article, Dale Kane, Lumileds' global market and business development manager, talked abou... read more
There are many types of ballasts. In principle, they can be composed of resistors, capacitors, inductors, and leakage transformers independently, or they can be combined with these devices or composed of other electronic components. 1, resistance ballast Resistive ballast relies on the relations... read more
Gas discharge lamp Gas discharge lamp is a lamp made by using current to generate light through gas. The energy consumed by gas discharge lamps is only 1/2-1/3 of incandescent lamps. The spectrum of a gas discharge lamp is discontinuous, and the spectrum is related to the type of gas and the disch... read more
