Dec. 06, 2023
Lights & Lighting
Here in the UK, most street lights were high pressure sodium until recently. Popular wattages were 70 watts, 100 watts, 150 watts and 250 watts.Click to expand...
Metal halide lamps are used when colour rendering is of more importance.
Incandescent lamps were used up to about 1975 but are virtually unknown now.
Series street lighting was never much used in the UK, more of a USA idea. Arc lamps were used in series, often 8 or 9 or 10 arcs in series on DC mains of 400 volts, 440 volts or 480 volts. Arc lamps "went out with the war" as did most DC supplies though a few survived for longer.
Interesting. Arc lighting slipped my mind, as the 19th and early 20th century competitor to gas lighting.My 100 year old Grandfather died in 2002, and the topic of gas lighting never came up--since, I arrogantly assumed it had to be inferior to electric lighting in every way. However, we at least know that it was superior enough to the hurricane lantern, enough, to boost literacy and factory production to around the clock. Made night theatre more practical. I guess, city streets more night friendly.Only with 8x18650 and a seriously efficient multi die or some diffuse led configuration, could I imagine leds could keep up with a gas camping light. My current guess as to how bright the old gas lighting was is between 300 and 900 lumens (more or less) depending on the cost of gas, supply pressure of the gas company. And, date-pre or post mantle.The UK does not have rows of street lights? Around here, one must go to the countryside to escape the street light. Townships, like mine, lack them in the neighborhoods.I dare not mention the non lighting applications future light poles-since I do believe it won't be good for economic or political democracy. All the ways streetlights can aid in cornering the people and an creating elite class, is a book unto itself. Too obvious are the plethora of possibilities, to bother to mention. With every good new technology application comes 4 negatives, I am now realizing. Not until naivete dies out, are new technologies safe. The problem is that naivete is reborn with each new generation, that it can never die out.
Lighting plays a crucial role in the safety and aesthetic appeal of our streets. One of the primary factors that determine the effectiveness of street lighting is the brightness level, which is measured in lumens. So, how many lumens do you need for a street light? Let's find out.
Lumens are the unit of measurement for brightness in light. Essentially, the higher the lumen count, the brighter the light.
For years, we used watts to choose our lights, but watts only measure power consumption, not brightness. Lumens, on the other hand, give us an accurate indication of how bright a light will be.
Lumens directly impact visibility. In the context of street lights, they affect how clearly motorists can see the road and pedestrians can navigate the sidewalks.
An LED (Light Emitting Diode) street light is a type of light fixture that uses LEDs as its light source. They're known for their high efficiency and long lifespan.
LED street lights are energy efficient, environmentally friendly, and have a significantly longer life span compared to traditional lighting solutions. They also provide excellent lumen output, which makes them ideal for street lighting.
The lumen output of LED street lights is what makes them superior. They provide bright, clear light, enhancing visibility on the roads while consuming less energy.
The appropriate lumen count for street lighting can vary depending on several factors.
Factors such as the type of road, speed limit, and the presence of pedestrians can all affect the required lumen count. In general, areas with high pedestrian or vehicular traffic may require brighter lights.
Although there's no universal standard, for minor roads and lanes, 2500-3000 lumens are typically sufficient. For busier roads and highways, 10,000-15,000 lumens might be necessary to ensure safety.
The correct lumen count in street lighting is vital for various reasons.
Adequate lighting prevents accidents by illuminating potential hazards. Proper lumen output is necessary for drivers to spot obstacles and pedestrians in time.
Selecting the right lumen count can result in significant energy savings. LED lights with high lumen efficacy use less energy to emit the same amount of light as other sources.
When compared to traditional street lights, LED lights come out on top in terms of lumen efficiency and durability.
LEDs produce more lumens per watt, meaning they're more efficient. This high lumen efficiency results in brighter lighting with lower energy consumption.
LED lights have an impressive lifespan, often lasting up to 50,000 hours or more. They're also more resistant to damage, reducing the need for replacements.
In conclusion, while the exact number of lumens required for a street light depends on various factors, LED street lights, with their superior lumen output and energy efficiency, provide the ideal solution for most urban and rural areas.
Q. What is a lumen?
A. A lumen is a unit of measurement for light output or brightness.
Q. How many lumens does a street light need?
A. It varies, but generally, minor roads need 2500-3000 lumens and busier roads require 10,000-15,000 lumens.
Q. What's the advantage of LED street lights?
A. LED street lights are energy-efficient, durable, and have high lumen output, providing bright and clear lighting.
Q. How do lumens affect energy efficiency?
A. Lights with high lumen efficiency (more light produced per watt) are more energy-efficient.
A. Yes, appropriate lumen output can improve visibility, enhancing safety for both motorists and pedestrians.
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