Lighting is the deliberate use of light to achieve some of the practical or aesthetic effect. There are 2 type of lighting available in the earth, which are artificial light source and natural light source. Example of artificial light source are lamp, street light and so on. Example of natural lighting are sunlight. With the proper lighting, it can enhance our task performance, set our mood, improve appearance of a region and so on.
The “brightness” of light can mean different thing for example, the amount of light coming from a light source is luminous flux (lumens), the amount of light falling on a surface is illuminance (lux), and the amount light reflected off a surface is luminance (cd/m2).
The earliest form of artificial lighting used by human being in the ancient to illuminate an area after the discovery of fire was campfire. Then, ancient people have begin to invented and used oil lamps to illuminate their living surrounding The oil lamps were made using some natural material such as hollow animal bones or hollow stones, then, they will fill these hollow natural materials with animal oil and a put a fiber wick on it. Then, candles and pottery lamps were also invented. The next artificial light source being invented was the gas lighting in the early 1800s, this type of light was used in some commercial buildings and in the homes of wealthy people. The gas mantle boosted the luminosity of utility lighting and kerosene lanterns. Then, in the 1880s, electric lighting have been invented and beginning to became ubiquitous in developed countries which can used to improved nighttime lighting, this made more activities possible at night, and more street lights being build in rural and urban area to reduce crime.
Indoor or interior lighting
Indoor lighting for a building is the light source that is being integrated into the inner of the building for some general purpose such as brighten the room and give some special or desired effect to the room.
Outdoor or exterior lighting
Outdoor lighting for a building is the light source that is being integrated to building’s outside for some general purpose such as to decorate the building at night and give improve the safety feature of the building to prevent some accident to occur when somebody walk or drive near to the building.
Interesting fact about lighting
1) Why plants are green? Due to the photosynthesis, plants will reflect green light and absorb other color, so that it can get the most suitable electromagnetic spectrum for carry out photosynthesis. So, if you put plant under green light, it will die, don’t try it.
2) If the sun have used up its fuel for burning and stop to eliminate light, nobody on earth would notice this phenomenon until 8 minutes and 17 seconds later- the time it takes for sunlight to reach us. But don’t worry, the sun has about 5 billion years of fuel left.
3) There is a record about ‘The world’s longest-lasting light’, which is the ‘Centennial Light’ in California, it start to light up since 1901, with a few interruption during power failures only.
4) Visible light is just the part of the electromagnetic spectrum that our eyes can see. That’s what makes LED light so efficient: unlike incandescent bulbs, LEDs are designed to only emit visible light and didn’t emit other unwanted light in the electromagnetic spectrum.
5) Fireflies emit cold light through a chemical reaction with near-100-percent efficiency. Scientists are working to mimic nature’s design to make LEDs more efficient.
LED Lighting Achievement
Lamp of the year -According to Time magazine, 2013 was the year of the LED lamp. That now seems a long time ago, as manufacturers begin to wonder what happens once the LED market for these long-lasting lamps is saturated. There are two possible options for this issue: up or out. Manufacture can choose whether to move upmarket by adding more features to this commodity product (deep learning, internet of things, colour-changing and so on) or manufacture can choose the second possible option, which is to leave the market completely. There are a lot of technology giant, such as the Osram, Philips and Samsung all tried the first option to move upmarket.
The Rise of LED Lighting
1) Lighting promote healthy-Light have influences us in various situation, condition. For example lighting will affect the productive we are at work, how well we learn and how quickly we recover from illness. The rise of LEDs have make it’s gradually getting easier and cheaper for lighting manufacturers to put this knowledge into practice, and this can make more LED products that promote health – the way used is usually by adjusting the brightness and colour of the LED light during the day to mimic natural light.
2) Act as a revolutionary materials- Shuji Nakamura, which is one of the Nobel Prize winner that has innovate the LEDs from the available coldest blue colour to violet colour. Nakamura’s violet LEDs put the gallium nitride on a base of some more gallium nitride rather than sapphire used in the blue LEDs – ‘GaN-on-GaN’ in technical parlance. The violet colour LEDs not only make the LEDs render colours better, they also open up the possibility for longer lives and greater efficiency. The violet LEDs believe will act as a new revolutionary materials and will be used in everything from phones to buildings to water filters. Researchers at the University of Manchester say violet LEDs high conductivity will make for brighter, longer-lasting and more efficient sources, and they hope to have a violet LEDs lamp on the market soon.
3)More and more application areas fall to LED-‘LEDs aren’t for every application…’ That’s something we’re hearing less and less. Some application areas have been slower to adopt the LED lighting than others – the efficiency of LEDs has been tough to beat in offices and LEDs have struggled to match the output of floodlights until recently – this year’s Super Bowl took place under LED light. In the past 12 months, manufacturers who had clung to old technologies such as metal halide and cold cathode have had to begin to use the LEDs for light up surrounding.
4) The improvement in quality-All of us seen examples of poor-quality LED lighting that make a room, café or office look dreadful, all for the sake of saving energy. But the Wild West of the LED market is being tamed, and even those who had their fingers burned in the early days are coming back wiser, with a renewed focus on quality.
5) Replacing role of Wi-Fi – The lastest developing technologies, Li-Fi (like Wi-Fi, using light) and indoor positioning (that tracks people’s position using luminaires of the LEDs in their position and their smartphones build in software and chip) are both based on visible light communication. It can be used to transform a lot of places such as the shops, museums and indoor spaces, and to turn the industry on its head as lighting products are used for completely new purposes