Diodes are part of electrical circuits serving as a kind of check valve to allow electricity to flow in only one direction. They are especially useful if electricity flowing the other way could damage key components. An LED lamp uses the diode, which has the added benefit of emitting a light when electricity is passed through one.
The main benefits of an LED lamp is that is has no filament to break or burn out, they do not get hot while operating and are small enough to be used in a variety of equipment such as cell phones and as indicator lights on other electronic equipment. They are also used to make numbers on calculators and digital watches. Most LED lamps were only available in red, yellow and a greenish yellow until recently when other colors became available.
The color of an LED lamp is determined by the output wavelength and virtually any color is now available including white, or what appears to be a clear bulb, and are frequently used as the light source for smaller flashlights. To prevent the LED lamp from burning to toast, a resister in a series circuit with the lamp is necessary.
LED Flashlights Burn Brighter Longer
With the use of an LED lamp and coin-size batteries, flashlights have continued to grow smaller as light emitting diodes typically require less voltage then incandescent light bulbs. There have super bright flashlights designed using several LED lamps and with the same batteries, using lower resistance in the circuit, enough power is generated to light several LEDs at the same time.
Since true white light from an LED lamp is really an illusion or extremely bright blue and a special coating on the bulb, photographs taken with a while LED lamp on the subject typically shows up with a bluish tint or a blue circle on the print where the light is the strongest. To reduce the tint or the blue halo effect, an orange filter can be used to hide the blue light from the film.
It is possible to replace tail lights of your car or motorcycle with LED lamps, but there would be several variables in play such as the number of lamps that would be needed to provide the brightness required by the laws in your state. Additionally, the red reflector still has to be in place and that will also reduce the brightness of the LEDs output.