Comparison of LED tunnel light and high pressure sodium lamp
1, simply from the luminous efficiency, LED light effect 90lm/w can not reach the light effect of sodium lamp 120lm/w;2, from the fog performance, the golden light orange fog better performance, of course, can also be replaced by warm white LED;3, from the initial cost of investment, LED lamp price is three to four times sodium lamp;4, from the cost of power saving, taking into account the power factor and other factors, LED lights can save about 60%;5, service life, LED lamp can theoretically reach more than 50000 hours, but by a variety of factor restrictions, such as lamp heat dissipation, the power of life, life can reach 12000 hours of sodium lamp, considering the high cost of maintenance in the tunnel, the LED lamp is more appropriate;Overall, 100WLED lamps can completely replace 200W high pressure sodium (sodium lamp is 250W, but the general specifications) should select the appropriate products from the color temperature, light efficiency, heat dissipation and so on, in addition to do the project is to sell the product, you can do a more detailed comparison of investment plan, product of the initial investment, energy saving the performance and maintenance cost analysis. In the long run, it is only a matter of time before LED replaces gas light.
100W LED tunnel light instead of 200W high pressure sodium lamp can not say no, this depends on the original 200W high pressure sodium configuration is too high. The advantage of sodium lamp is that the fog is strong and the deficiency is poor color rendering. The advantage of LED tunnel lamp is low energy consumption and high color rendering index. If the distance between the lights is not too large, it can be replaced, but the luminous flux of the light source has been reduced. This requires the reference of the relevant requirements of tunnel lighting to match the power of the lamp. It is suggested that 150 LED tunnel lights should be selected and the luminous flux will not be much different from the original one.
In theory, it should be able to do so, when it is quite difficult to implement.1 from the light emitting efficiency, high pressure sodium lamp can reach 120lm/w, and now LED long 90lm/w (of high power, low power due to decay cannot be overcome for the use of lighting), can achieve this level of the whole world is only Osram, Lumileds, Cree, the 3 companies, the other is the gap between the. If you count the two time, you can only do more than 80lm/w. However, when the junction temperature of LED is high, the luminous flux maintenance rate is decreased by up to 70lm/w. So now LED street lights, tunnel lights can do 70lm/w, that is, a few rare, this also refers to the color temperature greater than 4500k cold light, white light efficiency is lower.2., although from the light effect, LED is far less than high-pressure light, but can pass two times, optical uniformity can be much better than the current high-pressure light. In addition, color rendering is also an advantage. High pressure sodium lamp is only 30, while LED is basically larger than 70. So, from human perception, the LED tunnel light is much better than the high voltage sodium lamp.3., from the energy-saving point of view, now the best LED street lamp test results are 13% energy saving, relative to the traditional high pressure sodium lamp. The so-called 60%, 70%, smiled and passed.4., although LED theoretically has 50000 hours of life, it then maintained 70% luminous flux indicators, and the conditions are very harsh. The biggest problem, no one has been waiting for such a long time.
