Outdoor Lighting Cost Calculator
Calculate low-voltage LED landscape and architectural lighting systems including uplights, path lights, deck lights, transformers, and trenching wire.
Fixtures, Power Transformer & Electrician Labor
Low-Voltage Landscape Lighting Formula
Total Lighting Cost = (Number of Fixtures × Fixture Cost) + Multi-Tap Transformer + Direct-Burial Wire + Trenching Labor + Electrician Setup- Fixture Types: Solid brass directional uplights ($60–$140), pagoda path lights ($50–$110), wash/flood lights ($70–$150), and hardscape retaining wall lights ($40–$80).
- Low-Voltage Transformer: Stainless steel 150W to 300W 12V/15V transformer with astronomical digital timer ($180–$380).
- Direct Burial Cable: 12/2 or 10/2 low-voltage UV-resistant direct burial wire ($0.40–$0.75/linear foot).
- Professional Installation: Digging shallow slits, burying wire, mounting fixtures, and aiming beam spreads ($75–$150/fixture installed).
Step-by-Step Worked Example
Calculation Steps:
- Calculate fixture hardware: 10 fixtures × $75.00 = $750.00
- Add power transformer and wire: $750.00 + $280.00 + $125.00 = $1,155.00 materials
- Calculate installation labor: 10 fixtures × $95.00 = $950.00
- Calculate total installed investment: $1,155.00 + $950.00 = $2,105.00
- Calculate average turnkey cost per fixture: $2,105.00 / 10 fixtures = $210.50 / fixture
How to Use This Calculator
- 1Enter the number of architectural uplights and pathway fixtures.
- 2Select fixture grade (consumer aluminum vs professional solid cast brass).
- 3Add low-voltage multi-tap transformer wattage and wire spool length.
- 4Include professional installation and aiming labor (or select DIY).
- 5Review total fixture count, electrical wattage load, and system cost.
Assumptions & Limitations
- Assumes an existing exterior 120V GFCI outlet is accessible for transformer plug-in.
- Modern LED fixtures consume only 3W to 7W each, allowing 20+ fixtures on a single 150W transformer.
Frequently Asked Questions
How much does professional landscape lighting cost per fixture?
Professional landscape lighting typically costs $175 to $325 per fixture fully installed, including high-grade cast brass fixtures, 12V multi-tap transformer, direct burial cable, and night aiming adjustments.
Why choose low-voltage 12V lighting over line-voltage 120V?
Low-voltage (12V) is completely safe from electrical shock, does not require deep 18-inch conduit trenches (wire is buried only 6 inches deep), is easy to re-aim and expand, and consumes minimal electricity when using LED bulbs.
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