How do we define eco-friendly?
As we know, eco-friendly materials and things are those products creating no hazards to the environment. These products applied green living or green manufacturing methods that reduce the amount or type of resources used. In short, eco-friendly products are conducive to the planet without causing harm. Similarly, eco-friendly light bulbs are harmless to the environment. Nowadays the most eco-friendly light is the LED light bulb, which is more sustainable and recycled compared with common neon lights and halogen lamps.
How do lights affect the environment?
"Light pollution" is an environmental problem caused by the excessive use of lighting by humans. It comes from lighting such as home lighting, neon lights, landscape lighting, and strong lights from open-air sports fields and transportation hubs. These colorful and ubiquitous lights make the city's night as bright as day, and the reflection of sunlight by the glass curtain wall can cause strong visual fatigue even during the day. Of course, the bright lights of the city have also become a symbol of the prosperity of the metropolis. However, with the development of human society, "light pollution" has also become one of the sources of urban pollution, affecting the quality of life of urban residents. Moreover, "light pollution" has a tendency to spread, gradually affecting people's health.
People have lived in the dark for over 4 centuries. To increase the sense of security among Parisians, King Louis the Fourteenth of France instituted a public lighting policy and put in public lighting fixtures. This policy was intensified in the early 19th century when gas lamps were installed in the streets of Paris. In the 20th century, circuit lights have become a symbol of modernization and the progress of human civilization.
However, the Institute of National Audiovisual (INA) in France emphasized that is a hazard to human beings and biodiversity. The data from the journal Science Advances states that from 2016 to 2021, global light rose by 2%. The majority of people in the United States and Western Europe—99%—live in places with artificial lighting, according to Mr. Sordello, an engineer at the French Natural History Museum and the French Agency for Biodiversity. He said that "light pollution" is a global issue that is escalating.
In a polluted environment, the hazards are as follows: it makes it difficult for city dwellers to see the starry sky; this lighting not only consumes a lot of energy but also affects biodiversity. That is to say, light pollution will affect the ecological balance, destroy the life rules of animals, make them indistinguishable between day and night, and affect their activities, orientation, competition, and communication abilities. For example, excessive lighting can promote algal blooms, creating algal tides. Additionally, excessive "light pollution" can contaminate water and destroy plankton in aquatic bodies. Light pollution will have a bad influence on how nocturnal insects discriminate the direction, making it difficult for those plants that rely on nocturnal insects to disperse pollen, leading to species disappearance over time, destroying the entire ecological environment. Furthermore, light pollution also affects people's psychology and visual health. There will be various limitations in people's life if they are exposed to light pollution frequently or for an extended period at night.
How do we choose eco-friendly lights?
Above that, we conclude that some artificial lights can cause a hazard to biodiversity and human health. So choosing an eco-friendly lamp is very necessary for our family's health. Nowadays, LED light is a new inventor that is more sustainable and recycled compared with common neon lights and halogen lamps. The advantages of eco-friendly LED light bulbs will be listed in the following paragraph.
1.LED light source has a higher luminosity
Luminosity comparison: incandescent light has efficiency ratings around 10-15lm, halogen tungsten light has 12-24 lumens/watt, fluorescent light has 50-90 lumens/watt, sodium light has 90-140 lumens/watt, and most of the power consumption will become heat loss.
The efficiency of LED lighting: It may produce 50–200 lumens per watt. It has good luminous monochromaticity, a condensed spectrum, and may emit colored visible light without any filtration.
2. LED light sources are more energy-efficient.
LED lights use a DC drive, have a single tube driving voltage of 1.5–3.5 volts, and have a single tube power of 0.03-0.06 watts. The 15–18 mA current may operate at high frequencies and has a quick response time. The power usage is 1/10,000 of an incandescent lamp and 1/2 of a fluorescent tube under the same illumination conditions. LEDs, whose luminous efficiency is 2 times higher than fluorescent lamps, can replace half of the incandescent lamps and fluorescent lamps in Japan, which can save the equivalent of 6 billion liters of crude oil every year. The power of each LED is merely 18 watts, compared to the more than 40 watts of a fluorescent bulb to get the same effect.
3. The lifespan of an LED light source is lengthy.
The utilization of electronic light field radiation, the filament's ease of burning, thermal deposition, and light attenuation are characteristics of incandescent, fluorescent, and tungsten halogen lamps. LED bulbs have a service life of up to three years and an average lifespan of 30,000–50,000 hours, which can significantly cut down on maintenance costs and eliminate the discomfort of having to replace lamps regularly.
4. Strong safety and reliability
LED lights have low calorific value, no thermal radiation, and a cold light source. Moreover, they can be safely touched and precisely controlled in terms of the light type, luminous angle, and light color. They are free of glare, mercury, salt, and other potentially dangerous elements.
5. LED light sources help protect the environment
All-solid-state light-emitting objects known as LED lights are resistant to impact and difficult to break. They may be recycled without causing pollution and cut down on the generation of numerous hazardous gases, including carbon dioxide, nitride, sulfur dioxide, and other greenhouse gases. Because they can enhance people's living environments, they are referred to as "green lighting sources."
6. LED light sources use less energy.
The primary justification for our consideration of LEDs is energy savings. Perhaps LEDs are more expensive than traditional light sources, but the investment in light sources can be recovered with one year of energy saving so that the net energy saving period of several times each year in 4-9 years can be obtained.