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Led Lamp Research Paper

1004 Words5 Pages

Abstract — The consumers are gradually shifting to LED lamps from the traditional incandescent and CFL lamps as the LED lamps not only are more efficient than the conventional light sources but their lifetime is also more. With growing demand, there have been several developments in the field of LED lighting to suit the consumer needs and the color changing lamp is one of them. LED lamps are available in two colors, warm white and cool white. A consumer may prefer a particular color or the other depending on his choice. The color changing lamp allows the user to switch between the two colors in the same lamp instead of using two different lamps. The color changing lamp which is currently available in the market uses a microcontroller to switch between the colors, hence has a higher cost which limits its use. One way of making the lamp …show more content…

Several parameters like luminance, illuminance, luminous flux, luminous intensity, color temperature and color rendition index are considered while designing the driver circuit of a LED lamp. The most important parameters in designing the LED lamp driver circuit are the color rendition index and the color temperature. The Color Rendition Index (CRI) is the quantitative measure of the ability of the light source to reveal the colors of various object faithfully in comparison to the colors of the similar objects in natural light. Light sources with high CRI are desirable in color critical applications like photography and cinematography. The CRI value ranges from 100 to values in the negative. The highest value of CRI, i.e. 100, can be achieved is for a black body. Conventional light sources like low pressure sodium lamps have their CRI’s in the negative. CRI for fluorescent lamps is around 50 and LED lamps have CRI greater than

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