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Estimate maintained average illuminance from source lumens, utilization and maintenance factors. This is the lumen method, not a point-by-point photometric design or glare assessment. This browser-local calculator updates from numeric inputs and shows a labelled breakdown without uploading your data.
Estimate maintained average illuminance from source lumens, utilization and maintenance factors. This is the lumen method, not a point-by-point photometric design or glare assessment.
Calculate circle area, circumference, circular sector area and arc length from radius, central angle and measurement unit.
Estimate lighting fixture counts and average lux using room size, lumen output, utilization and maintenance factors with a 150W versus 200W comparison.
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