This initially resulted in different manufacturers’ white light bulbs not looking exactly white. White LED bulbs, however, rely on mix of colors and phosphor coatings to emit white light. For example, aluminum indium gallium phosphide (AlInGaP) is used as the semiconductor material for LEDs designed to emit light in wavelengths of 565 to 645 nanometers -or lime-green to red. LEDS can also be built to emit specific colored light by using specific kinds of semiconductor materials to control the wavelength of the light it emits. It takes just 1.6 volts of DC current to light a single LED. Most of the electricity entering an LED is used to make light. LEDs emit light through electroluminescence - that is, electrical current energizes electrons in the semiconductor material until the electrons emit a photon.
Light emitting diodes (LEDs) are semiconductors in a transparent epoxy casing. Ultimately, the bulb’s filament breaks due to heat -after about 1,000 to 2,000 hours on average. Because about 90% of the wattage used goes to heating up the filament, incandescent bulbs are pretty inefficient at making light -but you can use one to bake a cake. The amount of power required to make the filament glow at its optimal level (for lifespan and brightness) was rated in watts. Why are LED lights better than incandescent light bulbs?Īs many people already know, incandescent light bulbs make light by heating up a coiled tungsten wire filament in a vacuum inside a sealed glass bulb. Even nearly a decade after the introduction of the LED light bulb, there are still misunderstandings about them which, for the most part, are based on faulty knowledge and the resistance to adapt to something new. There’s never a shortage of myths about new technologies.
Each month, we will examine common misunderstandings about energy efficiency - whether it’s in your home or about the energy industry - and deliver real facts behind the myth (and how they they might be costing you money). Welcome to the Energy Efficiency Myths series from Direct Energy! As many myths arise from incomplete knowledge, they can create seemingly possible answers that many people accept as fact.
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