Flood Light Coverage Calculator
Layout & Planning

Flood Light Coverage Calculator

Calculate the illuminated area, center illuminance, and edge illuminance of a flood light at a given distance. Find how many fixtures are needed to meet a target foot-candle level across a defined area.
Fixture Specification
Fixture Lumens 10000
Beam Angle 90°
Mounting Height 20 ft
Tilt Angle 0° (0=straight down)
Luminous Efficacy 130 lm/W
Coverage Results
Beam diameter (at grade)—
Illuminated area—
Center illuminance—
Edge illuminance (50% beam)—
Fixture wattage—
Area Coverage Planning
Target area (ft²)
Required illuminance (fc)
Fixtures for target area—
Total system wattage—
—
ft diam
Beam at grade
—
fc center
Peak illum.
—
ft² coverage
Per fixture
—
W fixture
Power
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The calculators and tools on LightingCalc.lighting are provided for general guidance and informational purposes only. Results are estimates based on standard formulas and the values you enter — they do not constitute professional engineering, electrical, or architectural advice. Always verify calculations with a qualified professional before making decisions for any safety-critical, code-compliance, or commercial application. LightingCalc.lighting makes no representations or warranties as to the accuracy or completeness of any result, and accepts no liability for errors, omissions, or any outcomes arising from reliance on this information.