Lighting Design Calculation Report
Generated on May 19, 2025
Professional Illumination Analysis
Room Specifications
Dimensions: 15m × 12m × 3m
Room Area: 180 m²
Working Plane Height: 0.8m
Mounting Height: 2.2m
Target Illuminance: 500 lux
Lighting Type: General
Design Results
Number of Fixtures: 30
Layout: 6 × 5
Average Illuminance: 512 lux
Uniformity Ratio: 0.82
Power Density: 6.0 W/m²
Energy Efficiency: 111 lm/W
Fixture Specifications
Fixture Type: LED Troffer 2x4 ft
Lumens per Fixture: 4000 lm
Lamps per Fixture: 1
Lamp Lumens: 4000 lm
Maintenance Factor: 0.8
Utilization Factor: 0.7
Fixture Layout
Rows: 6
Columns: 5
Length Spacing: 3.0m
Width Spacing: 2.4m
Total Lumens: 120000 lm
Surface Reflectances
Ceiling
80%
Walls
50%
Floor
20%
Design Status: Compliant
Design meets illuminance requirements with good uniformity
Design Recommendations
- • Consider adding task lighting for detailed work areas
- • Implement daylight harvesting near windows to reduce energy consumption
- • Add occupancy sensors to further improve energy efficiency
- • Ensure proper color temperature (4000K recommended) for office environments
Calculation Method
Lumen Method Formula:
Total Lumens = (Target Illuminance × Room Area) / (Utilization Factor × Maintenance Factor)
Utilization Factor: Based on room cavity ratio and surface reflectances
Maintenance Factor: Accounts for lamp depreciation and dirt accumulation
Uniformity Ratio: Minimum to average illuminance ratio
Report generated by Electric Tools Suite
Professional electrical calculation tools