DECO Lighting on Twitter: "The UGR value is only calculated to determine glare from a viewer's prospectively, not photometrically. A Unified Glare Rating (UGR) less than 19, delivers an optimal, low-glare user
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Unified Glare Rating (UGR) Explained by TLA's Robert Hawkins - The Lighting Agency
Unified Glare Rating (UGR) basic explanation.
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Unified Glare Rating (UGR) Explained by TLA's Robert Hawkins - The Lighting Agency
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Glare: Do You Know The Essentials? - Professional Electrician