1、关于济南发光字的节能效果，在很多LED路灯取代高压钠灯的实际案例中，节电是一个重要的因素，但是实际的LED路灯并不比高压钠灯节电。从发光效率的比较,发光效率(80 lm / W)的大功率LED路灯远低于高压钠灯(100 ~ 138 lm / W)。尽管领导定向发光及其效率高于高压钠灯,LED路灯的综合能源效率仍低于高压钠灯由于其较低的发光效率。
1. As for the energy saving effect of Jinan luminescent words, in many actual cases of LED street lamps replacing high pressure sodium lamps, energy saving is an important factor, but the actual LED street lamps do not save electricity than high pressure sodium lamps. From the comparison of luminous efficiency, the luminous efficiency (80 LM / W) of high-power LED street lamp is much lower than that of high-pressure sodium lamp (100 ~ 138 LM / W). Although the LED directional lighting and its efficiency are higher than that of high pressure sodium lamp, the comprehensive energy efficiency of LED street lamp is still lower than that of high pressure sodium lamp due to its low luminous efficiency.
2、光色问题。目前大功率LED路灯主要采用色温在5000K ~ 6000K的白光作为道路照明光源。在视觉上过于寒冷，当距离视觉较长时，眼睛的观察能力会下降。
2. Light color problem. At present, white light with color temperature between 5000K and 6000K is mainly used as road lighting source for high-power LED street lamps. If it is too cold in vision, when the distance from vision is long, the observation ability of eyes will decline
3. At present, the cost of Jinan luminescent lamp is much higher than that of high pressure sodium lamp.
4. Compared with the service life, the nominal service life of Jinan luminous word is more than 50000 hours, which is the ideal service life of the chip. The packaging of the chip, the heat dissipation of the lamp and other factors will lead to light attenuation. Obviously, the life of the driving circuit can not reach 50000 hours. In the trial of some LED street lamps, it is found that the attenuation of street lamps has been very obvious in less than half a month.
At present, the nominal service life of high pressure sodium lamp has exceeded 28000 hours. Compared with the service life of high pressure sodium lamp and its accessories, the actual service life of 3-4 years is no problem.
For the maintenance of the light source, the high pressure sodium lamp is much easier, and the light source appliances can be directly replaced on site, with low cost.
5. Lighting power distribution. At present, LED street lamp distribution technology has made great progress. Some manufacturers have developed an auxiliary lighting power distribution system instead of relying solely on chip array light distribution. However, in a comprehensive view, light distribution can not be fully reasonable.
6. There is no uniform technical standard for specifications. At present, there is no unified technical standard for LED street lamp production. It's hard for every manufacturer to produce their own products according to their own standards. In addition, the characteristics of LED street lamp multi chip assembly make the chip and lamps bundled together, difficult to maintain. The original product must be used for maintenance.
Due to the unification of technical standards, Jinan luminous characters have a strong versatility. Products from different manufacturers can be used together. From the perspective of maintenance, this is very important, maintenance is the primary task of street lamp management unit. Only in this way can the street lamp be turned off in time for maintenance, so as to ensure high illumination rate (for the superior on the road, at the same time, the maintenance cost can be greatly reduced).