There are numerous applications available for LED lighting. Some of these include: LED in industry: Industrial-sized buildings such as an airport/factory operate with lights on 24 hours a day, 7 days a week. This means that electricity consumption is very high. The fact that the ceilings of these large industrial buildings are very high means that the light maintenance procedure is timely and therefore expensive. Not to mention the cost of replacing the bulbs themselves. The use of LED lights would greatly improve this situation. LEDs will use a fraction of the energy of the lights that came before them. The fact that LEDs are very energy efficient means that they are also reliable. LEDs last many times longer than halogen lamps or even the average CFL. Therefore maintenance costs are minimal. LED in retail: Nowadays people like to get away from home and go out and explore. Shops, especially clothing shops, are always on the list of people spending a day out, whether it's shopping or browsing, the shops will always attract the crowds. Therefore stores must be visually appealing to the public. A great way to improve the aesthetics of a store is to use lighting to your advantage. With LEDs available in an abundance of colors, it's a great way to attract buyers. It sets the tone for the store. LEDs are also used in retail for display purposes. The fact that most LEDs eject light in a linear fashion means they are suitable for showcasing a product, be it a watch or a bag. LEDs in Outdoor Spaces: LEDs provide an excellent way to illuminate our urban environment. LEDs are very versatile as they can be different colors. This gives architects, landscape architects and designers the ability to create a mood or atmosphere. For example... in the center of the paper... practically an insulator that does not allow the passage of current. To allow current to pass, electrons must be able to pass from one region to another. If a positive voltage is connected to the P-type region and a negative voltage is connected to the N-type region, an electric field will be created that allows free electrons to go towards the positive region and repel away from the negative region. It's the basic operation of a diode, but when do we start reaching light? LEDs work in the same way as a normal diode, in fact most normal diodes are light-emitting diodes, but the light produced is so small that it cannot be seen. LEDs operate in a state known as forward bias. This means that electrons and holes constantly move towards the depletion region and are replenished by the connected voltage. The process of electrons and holes meeting creates light.