LED Street Light

What is LED street lights ?

LED Street light is an integrated light that use LEDs as its light source. designed to improve roadway safety while reducing energy consumption.

The main components are aluminum housing, heat sink, LEDs, LED driver, PCB, optical Lens, wires and SPD. the led street light performance and quality depend on these materials use and design.

Different designs have been created that incorporate various types of LEDs into a light fixture. Either few high power and low power LEDs may be used. The shape of the LED street light depends on several factors, including LED configuration, the heat sink used with the LEDs and aesthetic design preference.

The led street lights technology developing very fast since these few years, the luminous efficiency from 10 years ago 60lm/w to now over 200lm/w, With energy savings up to 85% compared to HIDs, Metal Halide and High Pressure sodium, the energy savings is pushing LED street lights into the very mainstream. The MH and HPS have been the dominant light sources for the last 30 years, but LED Source street light are taking over faster than ever.

What is advantages of LED street Lights ?

Low energy consumption:

Many LED lighting retrofits have been claimed to dramatically reduce energy use

Long lifetime:

The projected lifetime of LED street lights is usually 10 to 15 years, 2-4 times the life of currently prevalent HPS.

lifetimes are typically set by a decrease in luminous output of 30%. But the functional lifetime of an LED fixture is limited by the weakest link; associated drive electronics are typically projected to last about 50,000 hrs, lower maintenance cost.

Higher CRI:

The color rendering index is the ability of a light source to correctly reproduce the colors of the objects in comparison to an ideal light source. Improved color rendering makes it easier for drivers to recognize objects.

Quick turn on and off:

Unlike fluorescent and high-intensity discharge (HID) lamps, such as mercury vapor, metal halide, and sodium vapor lamps, which take time to heat up once switched on, LEDs come on with full brightness instantly.

Immediate restart:

Unlike mercury vapor, metal halide and sodium vapor lamps (commonly used in street lighting), LEDs do not have a problem restarting immediately (hot ignition) following a brief power failure or inadvertent turn off.

Environmental protection:

The LED street light with RoHS compliance, which don’t contain mercury or lead, and don’t release poisonous gases if damaged.

Less attractive to nocturnal insects:

Nocturnal insects are attracted to ultraviolet light emitted by many conventional light sources.

Optically efficient lighting equipment:

Other types of street lights use a reflector to capture the light emitted upwards from the lamp. Even under the best of conditions, the reflector absorbs some of the light. Also for fluorescent lamps and other lamps with phosphor coated bulbs, the bulb itself absorbs some of the light directed back down by the reflector.

The glass cover, called a refractor, helps project the light down on the street in a desired pattern but some light is wasted by being directed up to the sky (light pollution). LED lamp assemblies (panels) can send light in the desired directions without a reflector.

Reduced glare:

Directing the light downward onto the roadway reduces the amount of light that is directed into driver’s eyes.

Higher light output even at low temperatures:

While fluorescent lights are comparably energy efficient, on average they tend to have lesser light output at winter temperatures.

Various shapes and designs and easy installation:

Smaller size LED Light fixtures are generally much smaller in size, allowing for easier installation and better aesthetics.

How to choose the right led street lights for your applications ?

Today, You will find a lot of different led street lights in the market around the world, so you must be confused that who is the best led street light for me ? below have some points for your reference:

1, How can I check the quality of led street lights ?

 Heat dissipation:

The most important for a led light is heat dissipation, if the lamp cann`t control the temperature at a reasonable range, then will be serious lumen depreciation and even broken soon.

LEDs:

The most led street light factory use top brand LEDs like Philips lumileds, Osram, Samsung, LG, Nichia. The led types use 3030, 5050 and 2835SMD.

Luminous efficiency:

Luminous efficacy is the true measure of a lamp’s efficiency. It indicates the lumens produced for every watt of electricity consumed. LEDs are more efficient than traditional bulbs with a higher luminous efficacy.

As the newest led technology, total lamp luminous efficiency can be reached up to 200lm/w, but for most of common street light still keep at 130lm/w – 150lm/w.

LED types and brand:

The well-know brand street light driver like Meanwell, Inventronics, Philips, Osram, Tridonic and others, the most of them are constant current Isolated driver, but some other driver companies launched Non-isolated driver to reduce the cost.

Optical lens design:

the light distribution if good or not depend on the optical lens design. Typical road-way distribution patterns include Types 2, 3, 4 and 5. but Types 3 and 5 are the most common.

Tool-free Maintenance:

access allows for easy installation and maintenance processes. Clips on he bottom of the fixture allows access to drivers and other vital components.

SPD protection:

10KV/20KV SPD will better protect the LED driver to resist Surge and thunder.

2, How do I know LED street light replace HPS and Metal Halide

LED Street Lights produce from 3600 lumens to 45000 lumens. Most inner-city street lights are low wattage HPS bulbs. We have low cost, high-quality street light options, offer you 5 year warranty.

Traditional Street Lamp	LED street Light
70 Watt HPS / Metal Halide	36W
100 Watt HPS / Metal Halide	60W
150 Watt HPS / Metal Halide	75W
250 Watt HPS / Metal Halide	120W
400 Watt HPS / Metal Halide	200W
1000 Watt HPS / Metal Halide	400W

3, What is color temperature for your LED street lights ?

We offer Street Light color temperature options from 2700k to 6500k.

The Warm white 2700k light has stronger penetration into fog during the rainy days and foggy days. It is more safety for driver especially at highway road, but warm white disadvantaged is low lumens than cool white.

The cool white 6000-6500K most brightness, higher lumens output and higher lux on the road, but the light penetration the fog not good as warm white.

So, the Nature white 4000k-5000K is perfect replacement for Metal Halide, 4000K is also an option for those states requiring a slightly warmer light. Other color temperatures available upon request.

What is standards applications for LED street lights ?

First we look at the classification and standards of roads. According to the road’s status in the road network, traffic functions, and service functions for buildings and urban residents along the route, urban roads are divided into expressways, main roads, secondary roads, branch roads, and residential roads.

Road lighting classification

According to the function of road use:

1. Motor vehicle road lighting: Motor vehicle roads are divided into three levels: Main roads and express roads, Secondary road, branch road.
2. Non-motorized vehicles and pedestrian road lighting:

Road lighting evaluation index

Motor vehicle traffic road lighting:

1. Average brightness (or illuminance) of the road surface
2. Road brightness uniformity
3. Glare limitation
4. Environmental ratio
5. Inducibility

Sidewalk lighting:

1. Average illuminance of road surface
2. The minimum illuminance and vertical illuminance of the road.

The LED street lights not only use for road lighting, but also use for parking lot and other applications, please contact GS LIGHT sales to get more details.