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Posts Tagged lumens

Consider Photopic, Scotopic, Mesopic Vision before Specifying Lumen Requirements

Photopic Scotopic Mesopic vision

Commercial photometry is important for lighting installers and their clients in choosing the best locations to install fixtures as well as ensuring maximum efficiency of lighting systems. The science of measuring light, in terms of how the human eye perceives its brightness, is called photometry. …

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Illuminance Explained

Color Accuracy

Illuminance is the amount of light striking a surface – also known as incident light, where the “incident” is the beam of light actually landing on the surface. Lumens are a measure of the quantity of light, referred to as luminous flux or just flux, emitted by a light source. When considering lighting applications, illuminance is used to measure …

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LUMENS: The new way to shop for light

Lumens - the new way to shop for light

New federal lighting regs to help consumers make ‘green’ lighting choices Starting Jan. 1, 2012, new federal regulations will require the most common light bulbs to be more energy efficient. Specifically, bulbs must produce the same amount of lumens (light output) for less wattage (energy consumption). All packages of light bulbs sold in stores after the New Year will carry a new Lighting Facts label – modeled after the “Nutrition Facts” labels on food packages –  to help consumers compare the brightness and estimated energy costs of various types of light bulbs. The new label will give consumers information about […]

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