Towns and cities among other places that need light are often illuminated using sources attached to raised poles. Street lighting usually involves sources that are put on and later off at specific times, mostly mornings and evenings. Light sensitive photocells are used in modern day illumination. They automatically switch on the lights in the evening, and off in the morning. In earlier designs, solar dials assisted in doing this. Poles carrying these sources are often connected through cables.
Before incandescent bulbs were invented, candle lighting was used in lighting cities. In the years that followed, bulbs were lit by people who went round the city every evening. They were then slightly improved to use an ignition machine that could strike fire automatically provided the supply of fuel was activated.
Invention of arc lamps made its mark as the foremost electric street illuminating method. Lamps made of carbon arcs using alternating current were used for ensuring that consumption of both electrodes took place at an equal rate. A departmental store in the French capital used this lighting system. The disadvantage with this type of illumination was the harsh intense light it emitted. It caused a lot of discomfort in towns, and maintaining it was time and resource consuming. They were replaced by brighter, cheaper and more reliable incandescent bulbs.
Incandescent lamps were often operated at a very high voltage in circuits arranged in series. The popularity of series circuits was influenced by the fact that the higher voltage in the circuits gave out more photons for every watt used. This arrangement also made it easy to control all bulbs in the district.
Contemporary street illumination entails use of discharge bulbs. In most instances, they are sodium lamps with high pressure within them. They emit large quantities of light, but only use small amounts of energy. Nevertheless, they are often found to be inappropriate for lighting during the night in contrast to ordinary white light. Study has established that the normal white light is the best for drivers owing to the fact that it helps them see properly, and act fast whenever braking is needed.
White light emitted by induction lights gives better lumen than those produced by previous sources. New technology has, therefore, brought less power consuming lights to replace existing forms of light. The newly invented lights have, however, lacked official specifications making them wait for a while longer before being accepted by most municipalities. Most towns are of lit using LED luminaries because they are efficient in energy production and consumption, and they perform well.
A harmonized system of measuring energy was invented to help minimize the amount of power used in measurement. Two like measurements are employed in this method. It is cheaper as compared to preceding methods. This new method of lighting projects and measures various aspects of pollution caused by light. These aspects include: glow, glare and trespass. With this method, technicians can quantify the performance of available and planned lighting systems and applications with the aim of reducing excessive light from moving out of the borders of a premise.
Accidents can be prevented, and safety promoted through proper lighting on the streets. However, if caution is not taken, street illumination can turn out to be disastrous. Street users and drivers are likely to encounter night blindness; stray energy that may cause electrocution, and fatal collisions caused by poor lighting.
Before incandescent bulbs were invented, candle lighting was used in lighting cities. In the years that followed, bulbs were lit by people who went round the city every evening. They were then slightly improved to use an ignition machine that could strike fire automatically provided the supply of fuel was activated.
Invention of arc lamps made its mark as the foremost electric street illuminating method. Lamps made of carbon arcs using alternating current were used for ensuring that consumption of both electrodes took place at an equal rate. A departmental store in the French capital used this lighting system. The disadvantage with this type of illumination was the harsh intense light it emitted. It caused a lot of discomfort in towns, and maintaining it was time and resource consuming. They were replaced by brighter, cheaper and more reliable incandescent bulbs.
Incandescent lamps were often operated at a very high voltage in circuits arranged in series. The popularity of series circuits was influenced by the fact that the higher voltage in the circuits gave out more photons for every watt used. This arrangement also made it easy to control all bulbs in the district.
Contemporary street illumination entails use of discharge bulbs. In most instances, they are sodium lamps with high pressure within them. They emit large quantities of light, but only use small amounts of energy. Nevertheless, they are often found to be inappropriate for lighting during the night in contrast to ordinary white light. Study has established that the normal white light is the best for drivers owing to the fact that it helps them see properly, and act fast whenever braking is needed.
White light emitted by induction lights gives better lumen than those produced by previous sources. New technology has, therefore, brought less power consuming lights to replace existing forms of light. The newly invented lights have, however, lacked official specifications making them wait for a while longer before being accepted by most municipalities. Most towns are of lit using LED luminaries because they are efficient in energy production and consumption, and they perform well.
A harmonized system of measuring energy was invented to help minimize the amount of power used in measurement. Two like measurements are employed in this method. It is cheaper as compared to preceding methods. This new method of lighting projects and measures various aspects of pollution caused by light. These aspects include: glow, glare and trespass. With this method, technicians can quantify the performance of available and planned lighting systems and applications with the aim of reducing excessive light from moving out of the borders of a premise.
Accidents can be prevented, and safety promoted through proper lighting on the streets. However, if caution is not taken, street illumination can turn out to be disastrous. Street users and drivers are likely to encounter night blindness; stray energy that may cause electrocution, and fatal collisions caused by poor lighting.
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