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Tubular Skylight - Size Charts

Model Size	Coverage Area	Wattage Equivalent	Max. Tube Length
10″ model	up to 150 sf	up to 300 watts	18 feet
13″ model	up to 300 sf	up to 500 watts	20 feet
18″ model	Up to 500 sf	Up to 1,000 watts	20 feet
21″ model	Up to 700 sf	Up to 1,450 watts	20 feet