Lighting Calculator
Calculate optimal lighting requirements for any room or space
Calculate Lighting Requirements
Ambient lighting for relaxation and TV watching
Room Dimensions
Calculated Area
Area: 12.00 m² (129.17 ft²)
Light Bulb Type
Lighting Calculation Results
Required Lighting
Provided Lighting
Lighting Assessment
Example: Kitchen Lighting Calculation
Step 1: Choose Room Type
Room: Kitchen (general area)
Required illumination: 108 lux
Counter area: 538 lux (for food preparation tasks)
Step 2: Measure Area
Kitchen dimensions: 4m × 2.5m = 10 m²
Counter dimensions: 4m × 0.6m = 2.4 m²
Step 3: Calculate Lumens
General lighting: 108 lux × 10 m² = 1,080 lumens
Counter lighting: 538 lux × 2.4 m² = 1,291 lumens
Formula: lumens = lux × area
Step 4: Choose Bulbs
General lighting: 2 × 800-lumen LED bulbs (1,600 lm total)
Counter lighting: 7 × 200-lumen LED spots (1,400 lm total)
Result: Adequate lighting for all kitchen activities
Lighting Level Guide
50-100 lux
Corridors, hallways, bedrooms
100-200 lux
Living rooms, dining rooms
300-500 lux
Offices, reading areas
500+ lux
Detailed tasks, workshops
Lighting Tips
Use multiple light sources for better distribution
Choose warm light (2700-3000K) for living spaces
Use cool light (4000-6500K) for work areas
Consider dimmer switches for flexibility
LED bulbs are energy-efficient and long-lasting
Unit Conversions
Illumination Units
1 foot-candle = 10.764 lux
Area Units
1 m² = 10.764 ft²
Formula
Lumens = Lux × Area (m²)
Understanding Lighting Calculations
Key Lighting Formulas
Lumens = Lux × Area (m²)
Bulbs Needed = ceil(Required Lumens ÷ Bulb Lumens)
1 foot-candle = 10.764 lux
- •Lux: Amount of light falling on a surface per square meter
- •Lumens: Total amount of light emitted by a source
- •Foot-candles: Imperial unit equivalent to lux
Lighting Design Principles
- •Ambient lighting: General room illumination
- •Task lighting: Focused light for specific activities
- •Accent lighting: Decorative or highlighting purposes
- •Light distribution: Avoid shadows and glare
- •Color temperature: Warm vs cool light selection
Pro Tip: Layer different types of lighting for the best results. Use ambient lighting as a base, add task lighting where needed, and accent lighting for atmosphere.
Room-Specific Recommendations
Living Spaces
Use warm lighting (2700-3000K) with multiple sources. Include table lamps, floor lamps, and overhead lighting for flexibility.
Work Areas
Use bright, cool lighting (4000-6500K) to reduce eye strain. Ensure even distribution without glare on screens.
Kitchens
Combine general ambient lighting with bright task lighting over work surfaces. Under-cabinet lights are ideal for counters.