Lighting tools
Watts to Lumens Calculator
Estimate lumens from electrical power and the stated efficacy of a lamp or luminaire. Adjust the inputs for a transparent planning estimate and review the stated limitations.
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Lighting Calculators and Planning Tools
Every Ross Light tool is designed to show its formula, inputs and important limitations. Results are planning estimates rather than construction specifications.
You can use the working room lumens calculator now. Additional tools remain under manual review until their calculations, controls, examples and safety notes have been tested. Use the basics library to understand the units behind each estimate.
Lighting tools
Room Lumens Calculator: How Much Light Do You Need?
Estimate total lamp lumens from room area, target footcandles and a light-loss factor. Adjust the inputs for a transparent planning estimate and review the stated limitations.
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Recessed Lighting Calculator: Count and Spacing
Estimate a starting recessed-light count from room area, target illuminance and fixture output. Adjust the inputs for a transparent planning estimate and review the stated limitations.
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Lux to Lumens Calculator
Convert target lux and metric area into an estimated total lamp-lumen requirement. Adjust the inputs for a transparent planning estimate and review the stated limitations.
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Lighting Electricity Cost Calculator
Estimate annual lighting electricity use and cost from connected load, operating hours and tariff. Adjust the inputs for a transparent planning estimate and review the stated limitations.
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Light Fixture Spacing Calculator
Build a simple, evenly spaced grid as a starting point for a room lighting layout. Adjust the inputs for a transparent planning estimate and review the stated limitations.
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LED Strip Power Supply Calculator
Size an LED-strip power supply from strip length, rated watts per foot and design headroom. Adjust the inputs for a transparent planning estimate and review the stated limitations.
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LED Energy Savings Calculator
Compare an existing lamp load with an LED replacement and estimate annual energy-cost savings. Adjust the inputs for a transparent planning estimate and review the stated limitations.
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Kitchen Island Pendant Spacing Calculator
Estimate equal pendant placement along a kitchen island while accounting for fixture diameter. Adjust the inputs for a transparent planning estimate and review the stated limitations.
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Color Temperature Picker by Room and Mood
Choose a practical starting color temperature based on room use and the atmosphere you want. Adjust the inputs for a transparent planning estimate and review the stated limitations.
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Beam Spread Calculator
Estimate the diameter of a symmetrical light beam at a selected throw distance. Adjust the inputs for a transparent planning estimate and review the stated limitations.
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