LED floodlights, also known as light-emitting diode, are considered as “the new light-bulb.” Because of its low energy consumption and low maintenance needs, LED floodlights have become a popular source of light and communication, especially for security purposes. In 1962, LED lights were first introduced as a low-intensity red light however later it developed into various kinds of light including the visible, ultraviolet and infrared with a significant enough brightness to be used as an alternative light source as oppose to the light bulb.
How do LED floodlights work?
The LED floodlight is generally a modified light bulb. When you switch an LED on, electrons are able to recombine with electron holes within the device thus releasing energy in the form of photons (light particles) i.e. emitting light. This effect is called electroluminescence. We generally see LED lights as a white light source but with minor modification of the energy gap of the semiconductor, the color of the light can change. Today, LED floodlights are used in various forms be it in communication or just for helping with visibility. They come in four form; miniature, mid-range, high-power and application specific lights.
Types of LED floodlights
Miniature LED lights are mostly single-diode, used as indicators in microchips and various electronics. Because of their size they emit more energy and thus more heat. Their maintenance is minimal but like any energy emitting device, they require a heat sink to cool them down and letting them work at optimal efficiency. They commonly have a flat round, triangular or square shape. Mid-ranged LED floodlights are used as a backup light source. Because of the high current, they might not be as durable but the light they emit is very powerful and is not used as a standard light source. It can be seen tail-lights on cars that are only temporarily turned on. High-power LEDs are very powerful sources of light that require a significant heat sink to work efficiently. They can be mostly seen in flashlights or any other powerful LED lamp such as the lamps on baseball filed or tennis courts. Application-specific variations LEDs can be divided into some general categories. Flashing LED floodlights are mostly seen as light sources that flash in a typical period of one second. They can be used as warning signals and can use more than one color at each flash. Bi-color LED floodlights use two different lenses in one case. It uses two dies connected to the same two leads antiparallel to each other. As the two different current flows make up two different colors, they could, if used in significantly short flashes, create a third color. These are mostly used in calculators. Tri-color LEDs are specific because they can light two dies simultaneously but be controlled independently. RGB (red-green-blue) LEDs are a more advanced sources of light that emit, as the name states, red, green and blue colors that can be lit simultaneously or independently, depending on what the user wishes. It usually has a built-in tiny electronic unit.
Modern usage of LED floodlights
The last and most advanced generation of LED lights is alphanumeric LED displays. They can handle all numbers and a limited amount of letters. Modified displays, known as Starburst displays, were popular in the ’70s and ’80s but were soon outdated as the rise of the liquid crystal displays (LCD) that required lower power and gave a superior image. In general, LEDs are not as used as before in the media, however they can still be a reliable source as a backup light or signaling. They could be used as backyard lighting and of course in various electronics for simple functions. LED floodlights might seem out dated, but they are very much alive and used today.