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Estimate the number of luminaires needed using a transparent lumen-method approximation. Enter area, maintained target illuminance, actual output lumens of two fixture options, utilization factor and maintenance factor, then compare required quantities, estimated lux and total watts.
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Estimate the number of luminaires needed using a transparent lumen-method approximation. Enter area, maintained target illuminance, actual output lumens of two fixture options, utilization factor and maintenance factor, then compare required quantities, estimated lux and total watts.
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.
A worked example using the listed default inputs. Vertical aiming and level ground only. A geometrical beam cone is not an illuminance, glare or lighting-design prediction.
No. Check verified rates, conditions and underlying rules first. Vertical aiming and level ground only. A geometrical beam cone is not an illuminance, glare or lighting-design prediction.
Using these sample input values gives the first labelled output above. Power sizing only; verify dimmers, voltage, cable drops and protection separately.
No. Replace the examples with your real values. Power sizing only; verify dimmers, voltage, cable drops and protection separately.
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