There are many reasons why LED technology should be considered for street and area lighting. Because they use so little energy LED lights are environmentally friendly. They are harmful chemicals such as mercury and lead which release toxins freely.
They are not made with leds like traditional HID bulbs, but instead with diodes. Diodes help improve lamps by giving them a higher rate of durability than other lamp technologies, which ultimately provide significantly longer life spans than resistance.
Because it highlights LED lumen output more efficiently, which allows consistent patterns of light to cover a wider range of leds is becoming more common in street lighting applications. Uniformity is one of the advantages of a carefully designed solid-state lighting product.
Improved uniformity means fewer hot spots (with dark pools following) than traditional light sources, thereby improving vision and safety. Illuminators often have to be overcompensated with rich initial lumens to account for lumens in the life of the light source.
Dark pools just continue to get darker lumens that depreciate against their rated life. Leds devalue more slowly than many traditional light sources, such as metal halides or sensing technology. In conjunction with light discarding less over time techniques,
Fewer initial lumens can be designed for this application. All of these factors, including higher light uniformity, improved color rendering and high color temperature, allow for wider coverage and reduce the power of the lamps required for many outdoor applications.
This significantly reduces energy costs and allows for lower cost of ownership over the life of the system.
However, the biggest mistake being made is to consider LED technology as an apple-to-apple comparison with traditional light sources. Buyers or LED products, including those used for street lighting symbols, want manufacturers to decipher semiconductor jargon and compare LED street lamps,
Take existing lighting technology and compete with LED lamps. This is difficult because there is no report on traditional solid-state lighting because the data is used for leds differently. As lighting is reinvented through technology, so should the industry
By applying lighting requirements. Past cavities and foot candles required a large degree of creation due to the characteristics of traditional lighting techniques. Color rendering, related color temperature, uniformity, and light attenuation vary with different technologies, affecting the vision of the lighting task.
The design compares the current new metrics to a largely failed attempt to deal with this revolution in the lighting industry.
What should an engineer consider when specifying a street lamp LED?
So, how can the optical evaluation design and performance of LED street lamps be considered at a best time? The tasks and directional lumens of light are not new concepts, but they are now more important than ever for road lighting and similar applications.
Attribute appearance (day and night), safety and quality: comparing products for all important reasons should be understood, where lumen guided luminaries are essential. The new IES BUG rating system (tm-15-07) provides some level of comparison.
Lumen per watt, as the only indicator, can lead to poor selection of outdoor lighting. Light patterns, uniformity, and optical efficiency are valuable comparisons that can be made across competing products. Lumens per watt is the best method for evaluating the luminosity of each luminaire with an eye to assigning illumination levels to the task and light.
In addition, LED street lamps are very directional because they produce uniformly distributed patterns of light. In comparison, traditional high pressure sodium lamps usually require higher output to achieve the same LED results in the same application.
HPS requires a larger input to achieve the desired output of light, typically requiring more energy to be measured.
In most cases today, LED lamps have higher cost performance than HPS brothers. But increasing demand and changing LED technology are driving down costs. But even at today's cost, the economy may be far more expensive in the long run than the initial investment. Depending on the application, a wide distribution of LED lighting coverage can reduce power requirements and the amount of longer life can reduce replacement and maintenance costs.