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  • Wuxi Kinglux Glass Lens Co.Ltd
  • ADD:No.286,Changjiang North Rd,New Dist,Wuxi,JS prov,China
  • Tel: 86-510-66759801
  • Fax: 86-510-84602998
  • Mobile phone: 86-18168862789
  • E-mail: ledglasslens@163.com
  • Contact person: Huimin Zhang
  • Understanding Color Rendering
    Mar 31, 2018

    The eye sees all objects in the form of reflected light. All of the colors contained in the object must also be present the beam of light to accurately reproduce the image in reflected light. The Color Rendering Index is a numerical scale from zero to one hundred used to rate the accuracy at which a light source will render colors. A value of 100 CRI indicates perfect color rendering. There is, however, another factor to consider in the color equation… the amount of light. Low light levels make an object lack color and look dull, or grayish.


    Natural daylight contains all the colors in the visible light spectrum, plus the Power, or Energy Level of the light in each color is nearly consistent across the entire spectrum.

    Ceramic Metal Halide

    The latest advancements in Ceramic Metal Halide technology provide lamps with high color temperature (CCT) and a variety of high CRI values available for various applications, vastly improving visual acuity. In addition, CMH lamps feature long lifetimes, similar to HPS lamps. CMH lamps are an excellent choice where visibility, good color rendering and minimized maintenance are required…in other words—virtually everywhere!

    Metal Halide

    A typical Metal Halide lamp does not contain all of the colors in the light spectrum. Additionally, the color power levels are inconsistent.

    High Pressure Sodium

    High Pressure Sodium (HPS) lamps are great for photopic (ability to see in bright light) lighting conditions and have been used primarily outdoors due to its high efficacy (lumens per watt) and long life characteristics. The light from sodium sources is predominantly emitted in the longer wavelengths, between yellow and red. HPS lamps are suitable for applications where color rendering is not a crucial concern.

    Mercury Vapor

    Clear Mercury lamps produce white light with a bluishgreen tint. While it may not be flattering to human skin color, it is an outstanding choice for foliage and landscape lighting applications. Mercury lamps with a phosphor coating on the outer lamp envelope help to somewhat correct this color rendering issue.