Lack of natural light during nighttime in the urban environment was always a problem. From basic inconvenience that people cannot see where they are going to the greater chance of being attacked or mugged during the night. Because the problem was there since humans started living together, history of street light is maybe longer than we think.
A metal-halide lamp is an electrical lamp that produces light by an electric arc through a gaseous mixture of vaporized mercury and metal halides (compounds of metals with bromine or iodine). It is a type of high-intensity discharge (HID) gas discharge lamp.
The lamps consist of a small fused quartz or ceramic arc tube which contains the gases and the arc, enclosed inside a larger glass bulb which has a coating to filter out the ultraviolet light produced. … Read More
While the correct use of the term “floodlights” is only in a context where we refer to very strong beams of light, people also use the term nowadays to describe powerful outdoor fixtures they install.
Flood lights are the most popular type of lights that are used outdoors. Basically, flood lights are used to illuminate large areas. … Read More
In the simplest terms, a light-emitting diode (LED) is a semiconductor device that emits light when an electric current is passed through it. Light is produced when the particles that carry the current (known as electrons and holes) combine together within the semiconductor material.
Since light is generated within the solid semiconductor material, LEDs are described as solid-state devices.… Read More
Floodlights are an artificial form of light with a broad beam. Floodlights are most commonly found in places where plenty of artificial light is needed. Some of these spaces include a large parking lot, places that host events such as concerts or theater halls, and outdoor playing fields.
There are even professional sports that require stadiums to have floodlights installed even if they want to host a game securing the day.… Read More
The IP Code, or Ingress Protection code, IEC standard 60529, sometimes interpreted as International Protection marketing, classifies and rates the degree of protection provided by mechanical casings and electrical enclosures against intrusion, dust, accidental contact, and water. It is published by the International Electrotechnical Commission (IEC). The equivalent European standard is EN 60529.
The standard aims to provide users more detailed information than vague marketing terms such as waterproof.… Read More
Without the sun, Earth would have no source of energy to keep biochemical processes going, and life would not exist. One feature of the sun’s enormous energy is the amount and quality of light it puts out.
Visible light makes up only a small fraction of electromagnetic radiation, which also includes radio waves, microwaves, x-rays and other “invisible” waves. Because “visible” is as much a physiological and concern as one of physics per se – after all, the sun existed well before eyes did – some units in physics concerning light account for this, while others deal only with light energy itself.… Read More
A fluorescent lamp, or fluorescent tube, is a low-pressure mercury-vapor gas-discharge lamp that uses fluorescence to produce visible light. An electric current in the gas excites mercury vapor, which produces short-wave ultraviolet light that then causes a phosphor coating on the inside of the lamp to glow. A fluorescent lamp converts electrical energy into useful light much more efficiently than incandescent lamps.… Read More
Street lights, also known as light poles, lampposts, and street lamps, are raised public fixtures that provide illumination on the edge of a road or path when light is needed. Light-sensitive photocells are activated automatically at dusk, dawn, or at the start of dark weather. Street lights were first used in the city of Antioch from the 4th century to protect pedestrians from tripping on a path.… Read More
The 12v LED light is known to hobby enthusiasts as the: (Light Emitting Diode), purchased from electronic repair supply stores. You can usually see these LED’s showing up in appliances and gadgets that indicate the power supply is On. In recent years the level of advanced technology has allowed the 12v LED to take on a bigger role. Since 12v LED’s consume only 3 watts of power, they became ideal for replacing incandescent light bulbs.… Read More