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Colors of Light

For good visual comfort, light needs to have the right color and quality. Light can feel cool or warm. This is quantified by the “color temperature” and measured in degrees Kelvin. Color Temperature The higher the color temperature, the bluer the light is.  This may seem counter-intuitive, as we think…

Light Distribution & Glare

For true visual comfort, you don’t just need the right amount of illumination. Light needs to be well distributed to avoid discomfort. Glare Areas of high brightness right next to areas of low brightness cause glare, making people uncomfortable.  For instance, having a bare lightbulb for your desk lamp may…

Measuring Light Levels

To design for visual comfort, you need to know how to measure light. The measurement and perception of light can be an in-depth topic, and effectively analyzing daylight requires being precise with the terms and metrics used. Basic Metrics The “brightness” of light can mean different things: for example, the…

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