This means that an LED lightbulb is available for every circumstance. The light beam of an LED bulb is generally between 8° and 360°. LED bulbs come available in a variety of colour temperatures. In addition, it is special waste, which cannot be easily disposed of. For example, a broken CFL bulb is not only harmful to your health because of the mercury vapor, but also to the environment. Something that is great about LED bulbs is that they contain no toxic chemicals. Therefore, a fast amortisation time is usually guaranteed within one year. The longevity of the LED products leads to low replacement and energy costs. However, incandescent bulbs only last 1000 hours. The average lifetime of an LED bulb is about 15 - 40 hours. No energy is wasted, and it is possible to save up to 80%. Through the constant movements of the electrons in the semiconductor, light is then generated.īecause it is no longer necessary to heat up a filament in an LED, the main advantage of these lightbulbs is that they are energy efficient. A diode is an electrical component with two electrodes, which only allows electricity to pass freely in one direction. On the other hand, LEDs' versatility has opened up a whole new world of lighting design.We’ve put together some comparisons of the two different lights to help you decide which one you prefer. The light quality it produces is often too cool for popular taste." NARRATOR: LEDs are also more expensive than other lights. KOPP: "The LED's great advantage over the other systems we have mentioned is that it's efficiency is about 25 to 30 percent. Both small and brilliantly luminous, LEDs are available in a wide range of shapes, colors and sizes. This is converted by the phosphorescent coating on the inside of the tube into visible light." NARRATOR: The new shining star among electrically powered light is the LED, which stands for light-emitting diode. ![]() When an electrical discharge begins inside the tube, ultraviolet radiation is emitted. KOPP: "Fluorescent lamps are made of largely evacuated glass tubes that contain a small amount of mercury. Essentially, they are compact fluorescent lamps, often appearing in tubular shapes. This enables the filament of the lamp to operate at much higher temperatures and with much greater efficiency." NARRATOR: So-called energy-saving lights are even more effective. A small amount of halogen is introduced into the transparent envelope. KOPP: "A halogen lamp works in the same way as an incandescent bulb but with one significant difference. The remaining 95 percent is lost as heat." NARRATOR: The halogen lamp, which essentially is an incandescent bulb with halogen filling, is somewhat more effective than its predecessor. KOPP: "Five percent of the energy involved ends up as light. However, laboratory tests show that its use of electricity is highly ineffective. The light is a luminous white." NARRATOR: The light quality of the good old incandescent bulbs is unbeatable. This is how a light bulb should look when switched on. If I increase the current, the tungsten filament begins to glow. HARTMUT KOPP: "A regular glass bulb contains a tungsten filament, which is heated by an electric current. A universal symbol of brilliance, they are, in a matter of speaking, electricity at its best and brightest. NARRATOR: When the sun goes down and natural light has all but disappeared, lamps and light bulbs come to our aid. SpaceNext50 Britannica presents SpaceNext50, From the race to the Moon to space stewardship, we explore a wide range of subjects that feed our curiosity about space!.Learn about the major environmental problems facing our planet and what can be done about them! Saving Earth Britannica Presents Earth’s To-Do List for the 21st Century. ![]() Britannica Beyond We’ve created a new place where questions are at the center of learning.100 Women Britannica celebrates the centennial of the Nineteenth Amendment, highlighting suffragists and history-making politicians.COVID-19 Portal While this global health crisis continues to evolve, it can be useful to look to past pandemics to better understand how to respond today.Student Portal Britannica is the ultimate student resource for key school subjects like history, government, literature, and more.From tech to household and wellness products. This Time in History In these videos, find out what happened this month (or any month!) in history.#WTFact Videos In #WTFact Britannica shares some of the most bizarre facts we can find.Demystified Videos In Demystified, Britannica has all the answers to your burning questions.Britannica Explains In these videos, Britannica explains a variety of topics and answers frequently asked questions.Britannica Classics Check out these retro videos from Encyclopedia Britannica’s archives.
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