Calculate required foot-candle levels and LED fixture count for any commercial space. Uses IES standards with AI-powered photometric simulation.
⚡ Open Calculator (Free)No signup required. Results in 30 seconds.
| Application | Minimum FC | Recommended FC | Standard |
|---|---|---|---|
| Parking Lot (open) | 1 | 2-5 | IES RP-20 |
| Parking Garage | 5 | 10-15 | IES RP-20 |
| Warehouse (general) | 10 | 20-30 | IES |
| Warehouse (pick/pack) | 30 | 50 | IES |
| Office (general) | 30 | 40-50 | IES |
| Retail | 30 | 50-75 | IES |
| Manufacturing | 30 | 50-100 | IES |
| School / Classroom | 30 | 50-75 | IES RP-3 |
| Hospital (general) | 30 | 50-100 | IES |
| Sports (recreational) | 20 | 30-50 | IES RP-6 |
| Sports (competition) | 50 | 75-100 | FIFA/NCAA |
| Gas Station (canopy) | 20 | 30-50 | IES |
| Loading Dock | 10 | 20-30 | IES |
| Roadway (M3) | 0.6 | 1.2 | CIE 140 |
| Building Exterior | 1 | 3-5 | IES |
CU = Coefficient of Utilization (0.5-0.7), LLF = Light Loss Factor (0.7-0.85)
Enter your space dimensions and application type. AI automatically looks up IES standards, selects optimal fixtures, calculates exact count, and generates a photometric simulation with uniformity verification.
Try Free Calculator →Multiply by 10.764
1 fc = 10.76 lux
5 fc = 53.82 lux
30 fc = 322.9 lux
50 fc = 538.2 lux
100 fc = 1076.4 lux
Divide by 10.764
50 lux = 4.65 fc
100 lux = 9.29 fc
300 lux = 27.87 fc
500 lux = 46.45 fc
1000 lux = 92.90 fc
A foot-candle (fc) is a unit of illuminance measuring the amount of light falling on a surface. One foot-candle equals one lumen per square foot. It is the standard measurement for lighting design in North America.
Multiply foot-candles by 10.764 to get lux. For example, 50 foot-candles = 538 lux. Lux is the metric equivalent used internationally.
Lumens per square foot equals foot-candles. A parking lot needs 1-5 lumens/sq ft, a warehouse needs 20-30, an office needs 30-50, and a stadium needs 50-150+.
LightSpec AI by Auvolar is a free online tool that automatically calculates foot-candle levels, fixture count, and layout for any commercial space. It uses IES photometric data and includes 3D visualization.