Lighting
Room footcandles, fixture count, lighting watts, lumen output, task lighting, and emergency battery runtime.
Lighting And Illumination
Lumens, footcandles, lux, fixture count, lighting load, emergency lighting, and lighting energy calculators.
Subcategories
Published Calculators
Task Lighting Load Calculator
Estimate connected lighting power, active power, annual energy use, and annual cost from fixture quantity, operating schedule, and electricity rate inputs.
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Room Footcandles Calculator
Estimate average room footcandles and lux from total lumens, room area, coefficient of utilization, and light-loss factor for early lighting layout review.
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Photocell Load Calculator
Estimate connected load, annual kWh, and annual cost from fixture count, duty schedule, operating days, and entered electricity rate.
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Occupancy Sensor Savings Calculator
Estimate annual energy and cost savings from baseline hours, controlled hours, lighting load, operating days, and electricity rate.
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Mounting Height Calculator
Estimate mounting height above the workplane, maximum spacing, row count, and actual row spacing from entered lighting layout values.
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Lighting Controls Savings Calculator
Estimate annual energy and cost savings from baseline wattage, controlled wattage, operating schedule, and electricity rate.
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Lighting Uniformity Calculator
Estimate illuminance uniformity ratios from minimum, average, and maximum readings on the same measurement basis.
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Lighting Circuit Voltage Drop Calculator
Estimate lighting-circuit voltage drop, percent drop, end voltage, and approximate conductor loss from entered electrical values.
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Light Loss Factor Calculator
Estimate maintained lumens by multiplying initial lumens by the project-selected light-loss factors.
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LED Retrofit Payback Calculator
Estimate annual energy savings and simple payback from fixture wattage, count, operating schedule, electricity rate, and project cost.
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Fixture Spacing Calculator
Calculate rectangular-room fixture spacing, rows, columns, and count from mounting height and spacing criterion.
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Fixture Count Calculator
Calculate preliminary fixture quantity from area, target footcandles, fixture lumens, coefficient of utilization, and light-loss factor.
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Exit Sign Load Calculator
Calculate total exit-sign load and optional emergency-duration energy from sign wattage, count, and duration.
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Emergency Lighting Duration Calculator
Calculate emergency lighting runtime from usable battery energy, emergency load, conversion efficiency, and reserve assumptions.
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Dimming Energy Savings Calculator
Calculate annual kWh and cost savings when dimming reduces average lighting power over a stated schedule.
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Daylight Factor Calculator
Calculate daylight factor ratio and percent from paired indoor and outdoor illuminance readings recorded on the same basis.
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Lighting Power Density Calculator
Reports connected lighting power density from served area and lighting load in both W/sq ft and W/sq m without applying an energy-code limit.
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Lumen Calculator
Estimates required lumens, target lux, and an initial fixture count from room area, target illuminance, coefficient of utilization, light loss factor, and fixture lumens.
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Lighting Energy Savings Calculator
Estimates annual energy use, electricity-cost savings, and simple payback for a lighting retrofit from fixture wattage, operating schedule, electricity rate, and project cost.
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Lighting Layout Calculator
Estimates an initial fixture grid and nominal average illuminance from room dimensions, mounting height, spacing criterion, and fixture lumens.
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LED Driver Load Calculator
Estimates LED-driver watts, VA, adjusted continuous load, and circuit current from driver rating, quantity, power factor, multiplier, voltage, and phase.
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Lighting Circuit Load Calculator
Estimates lighting branch-circuit load, current, and fixture capacity from fixture wattage, quantity, continuous-load factor, voltage, phase, and an entered breaker value.
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Footcandle Calculator
Estimates average illuminance in footcandles and lux from fixture lumens, area, coefficient of utilization, and light loss factor.
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Emergency Lighting Battery Calculator
Estimate emergency-lighting battery energy and amp-hour requirements from the connected load, required runtime, battery voltage, usable capacity, conversion efficiency, and reserve.
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