Pathway Lighting Calculator
Plan the perfect outdoor lighting layout for pathways, walkways, and gardens. Calculate light spacing, quantity, wattage requirements, and energy consumption.
Step 1: Pathway Specifications
Lighting Layout Formula
Number of Lights = Pathway Length ÷ Spacing Between Lights
Total Wattage = Number of Lights × Wattage per Light
Total Lumens = Number of Lights × Lumens per Light
Step 2: Lighting Options
Recommended Lighting Guidelines
Residential pathways: 5-15 foot spacing
Garden paths: 8-20 foot spacing
Driveways: 10-25 foot spacing
Commercial paths: 4-12 foot spacing
Safety lighting: 300+ lumens per light
Pathway Lighting Results
Total Lights Required
*Based on 6 hours nightly operation, $0.12 per kWh. Actual costs may vary based on local electricity rates and usage patterns.
Lighting Type Comparison
| Lighting Type | Wattage | Lumens | Annual Cost* |
|---|
*Annual cost based on 5 lights, 6 hours nightly operation, $0.12 per kWh. Solar lights have $0 energy cost after initial purchase.
Pathway Lighting Formulas
Basic Lighting Calculations
Number of Lights = Pathway Length ÷ Spacing Between Lights
Total Wattage = Number of Lights × Wattage per Light
Total Lumens = Number of Lights × Lumens per Light
Annual Energy Cost = (Total Wattage × Hours × Days × Rate) ÷ 1000
Where:
• Hours = Daily operating hours
• Days = Days per year (typically 365)
• Rate = Electricity cost per kWh
Spacing Guidelines:
• Safety lighting: 4-8 foot spacing
• Ambient lighting: 8-15 foot spacing
• Decorative lighting: 10-20 foot spacing
Example Calculation
Example: 50-foot Garden Path
Path Length: 50 feet
Light Spacing: 10 feet
Wattage per Light: 7W (LED)
Lumens per Light: 300 lm
Calculation:
Number of Lights = 50 ÷ 10 = 5 lights
Total Wattage = 5 × 7 = 35W
Total Lumens = 5 × 300 = 1500 lm
Annual Energy Cost (6 hours nightly):
(35W × 6h × 365 × $0.12) ÷ 1000 = $8.40/year
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