The advantages and future challenges of lighting tunnel lights

Comparison of lighting and traditional tunnel lighting source Lighting is a kind of electrodeless conductor device, which can directly convert electricity into light, compared with traditional road tunnel lighting sources (sodium lamps, metal halide lamps, etc.). The lighting source has the following advantages: (1) Low light decay: the first 10000h is positive light decay, the first 10000h luminous decay is 3%-10%, the first 50,000h is basically 30%, which is much lower than ordinary road lighting sources, and the light is more stable . (2) High color rendering: general lighting color rendering is about 70～80, general high pressure sodium lamp is 20～35, low pressure sodium lamp is lower, so even if the brightness of traditional light source is higher than lighting, the visual effect is worse than lighting. , 'Not the brightest, but the clearest to see' This should be a direction for the development of lighting source applications. (3) Life: The life of lighting is higher than that of general road tunnel lighting sources, and it is generally higher than 60,000H now. (4) Price: Although the current price of lighting lamp heads is higher than that of traditional lighting lamps, as the manufacturing technology matures, the price is currently declining. In addition, the lighting also has the advantages of high maintenance coefficient, good safety performance, no flicker, energy saving and environmental protection. Challenges to the prospects of lighting tunnel lights At present, among the light sources used in tunnel lighting applications, high-pressure sodium lamps have been widely used because of their higher photopic luminous efficiency (up to 120lm/w). However, high-pressure sodium lamps are used in tunnel lighting. There are still some insurmountable problems, mainly due to poor color rendering and limited range of light source power selection (usually only 250W and 400W can be selected), especially in interior lighting, high-pressure sodium lamps do not have low power on the one hand, and on the other On the one hand, the glare and strobe caused by strong point-like light sources are more serious. In some long tunnels, straight-tube fluorescent lamps have also been used because of their higher color rendering and linear lighting with better visual induction. However, due to the short life of fluorescent lamps, usually only about 8,000 hours, they often need to be replaced. , Greatly increasing the maintenance cost of the tunnel. In addition, the power of the fluorescent lamp is small, and it cannot meet the requirements in areas that require higher illuminance such as the entrance section, transition section and exit section. In recent years, with the maturity of the lighting technology, due to the elimination of the influence of the electrode factor, the electrodeless fluorescent lamp has a longer life compared to the traditional fluorescent lamp, and it can also achieve greater power, which makes the lighting show an advantage in tunnel lighting occasions. . However, the light-emitting surface of the lighting is large, and the optical efficiency of the entire lamp is low when the optical design is performed. Although there are still many difficulties and challenges in the large-scale application of lighting tunnel lights, such as the imperfect lighting product standards, the negative impact of some inferior products on market promotion, and the high initial purchase cost of lighting tunnel lights. These have brought pressure to the large-scale market application of lighting tunnel lighting products, but these pressures are inevitably encountered in the initial stage of promotion and application of any new technology and new product. However, with the further development of high-power white light lighting technology, the continuous maturity of the overall system technology of lighting tunnel lighting, and the further enhancement of people's awareness of energy saving and environmental protection, lighting technology is bound to create a new future for the semiconductor lighting industry in the field of tunnel lighting applications. The shell of the lighting tunnel lamp is made of high-strength, good toughness alloy environmentally friendly materials, and the transparent part is reinforced tempered glass, which is dustproof and waterproof, corrosion-resistant and rust-resistant. It has strong resistance to strong collision and impact; multi-channel anti-vibration structure and high-tech surface spraying treatment, various short-distance high-strength high-frequency vibrations can not affect the lamps, and can be used in workshops, roadbeds, rails and other high-frequency vibrations and moisture , Long-term stable work in high temperature environment. Good electromagnetic compatibility, will not cause interference to the transmission network.