As LED technology continues to manifest in different facets of our daily lives， one place that they are becoming increasingly more popular are the streets。 Traditionally， our streets have been illuminated by high-pressure sodium lamps， which utilize excited sodium particles to produce light。 LED street lights have proven to have several benefits over these lamps， including producing more light per watt and sporting longer lifetimes； however， there are some drawbacks to these lights， such as glare。 Let’s get a better understanding of LED street lights and how they are quickly becoming the new lights that guide our paths。
Although the LED technology used for street lighting is relatively new， the science behind it is actually widely known because the LED itself has been around for decades。 Basically， an LED is just a light bulb without a filament， and its color and illumination intensity depend on the movement of electrons in semiconductor materials。 Moreover， because LEDs are based on solid-state technology， they can be more easily controlled and programmed， which makes them one of the most versatile and flexible light sources available today。
The LEDs used in high-quality street light fixtures are often referred to as high-power LEDs。 The service life of LED street lights can exceed 50，000 hours， which is equivalent to nearly 6 years of continuous work， which is equivalent to 12 hours of work per day， and the service life is 12 years。 In order to meet the existing external dimensions， the installation equipment can adopt the traditional cobra head design， and according to lighting applications （ie highways， residential streets， parking lots， etc。）， LEDs with various wattages and different color temperature ranges can be provided。 From 3000K （warm white） to 6000K （day white）。 They are largely unaffected by vibration and temperature limits because they do not have fragile filaments or glass shells。 Among other functions， the LED turns on at full brightness almost immediately， with no retransmission delay。
Rewriting street lighting standards Over the past few decades， high and low pressure sodium lamps have been the de facto standard for street and safety lighting， but improved LED technology and lower prices may rewrite the standard in the near future。 By 2015， the utilization rate of LED street lamps will be second only to high-pressure sodium lamps and become the second largest utilization rate。 By 2020， LED street lamps will continue to develop toward a dominant position。
The improved energy efficiency of LEDs means that， coupled with modern luminaire design， these lights allow for reduced illuminance without compromising safety。 LEDs help lower carbon emissions by reducing the demand for electricity， which is still largely generated by burning fossil fuels。 Another LED benefit is better control over the color content of light。 Manufacturers now produce LEDs with “warm” color qualities at high energy efficiency， rendering old arguments about the perceived inefficiency of warm white LEDs moot。 These same LED options also provide accurate color rendition without emitting excessive amounts of potentially harmful blue light
Relative to other outdoor lamps， LEDs are thought to be extremely long-lived。 When switched on， LEDs are instantly at full brightness， unlike HID lamps that have a significant time delay to begin emitting light。 LEDs also have very low minimum electricity thresholds to produce light， meaning they can be dimmed to much lower illumination levels when less light is needed and resulting in further energy savings。
Selecting LED street light products for outdoor lighting applications involves a series of considerations and trade-offs。 These include：
Luminous efficiency （wattage to lumens）： How many lumens is produced for each watt of electrical energy input？ More importantly， the lumens from the light source meet the task requirements （"fixed lumens" and "lamp bead lumens"）
Lumen output： How much light will be generated relative to the amount of light required for a specific task？ When replacing existing luminaires， it is important to use only the required lighting level and not to use unnecessary brightness increases。
Correlated color temperature （CCT）： Does the light source have "warm" or "cool" quality？
Color rendering index （CRI）： How does light accurately present color to the human eye？ Higher CRI is not required in all cases。 Relative to the lighting application in question， the need for good color reproduction should be considered。
Adaptive control integration： Do lighting devices use adaptive controls such as dimmers， timers and/or motion sensors？ These controls are the future trend in the field of outdoor lighting， which can save more energy， improve the efficiency of light sources and improve the performance of visual tasks。 It is important that in the design process of adopting a new lighting device， even if adaptive control is not implemented immediately， it must have the ability to use adaptive control。
Heat dissipation： Is the lamp body designed to dissipate heat sufficiently？ Since the efficiency of LEDs will decrease as the operating temperature increases， it is important to control the heat emitted by LED lights in a warm climate。
Lumen depreciation： how resistant is a lamp to loss of efficiency over time？ Manufacturers often refer to "L70"， which is the expected use time before the bulb reaches 70% of its initial light output。
Closely related to all these factors is the cost： what is the cost of the LED replacement solution？ The price of commercial LED lighting products continues to fall， and the capital cost recovery time for the installation of new LED street lamps， once it reaches 10 years or more， is now usually less than 5 years， and continues to decline。 As implementation barriers decrease， LEDs have become the preferred lighting technology in new outdoor installations and existing fail-over installations。
No matter what you think about LED street lights， you can be sure of one thing： their brightness is constantly improving。 What is your opinion on the rise of LED street lights？ Leave your question below， or leave us a message！
HISHINE provides high-quality LED street lamps for various types of road lighting, street lighting, high-speed lighting, and city lighting. In order to provide the best lighting solution for your project, please feel free to contact us to get a free DIAlux simulation.
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