Landscape lighting: survey

Low-voltage landscape lighting: watts and VA per run, fixtures per product, voltage drop and voltage at the last fixture, transformers.

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Feet and inches or metric: your choice. One switch on the sheet converts every measurement.

Landscape lighting: survey: a filled-in survey in MesuPro — A survey made with this template, in the app.

What you measure

The template's tables and their columns, as the app shows them. Calculated columns fill in as you type.

Fixtures

Location
Fixture (product)
TypeChoices: Path light Uplight or spotlight Well light Wall wash Step or deck light Other fixture
Number of fixtures
Watts each (W)
VA each
Wire run
Total watts (W) calculated
Total VA calculated
Notes

Wire runs

Wire run
Transformer (product)
Tap voltage (V)
Wire gauge (AWG)Choices: 18 AWG 16 AWG 14 AWG 12 AWG 10 AWG 8 AWG
Wire constant
Run length (one way)
Watts on the run (W)
Voltage drop (V) calculated
Voltage at the last fixture (V) calculated
Notes

Transformers

Transformer (product)
Rated output (W or VA)
Number of transformers
Mounting place
ControlChoices: Photocell Timer Smart timer (Wi-Fi) None
Notes

About this template

Low-voltage landscape lighting, fixture by fixture and run by run: watts and VA per run, fixtures per product, each run's voltage drop by the maker's formula, and the transformers as their labels print them.

Guide and sources

Fixtures: one row per kind of fixture at a place, with its product, count, watts and VA from its label, and the wire run it hangs on. The sheet adds the watts and the VA per run, and the fixtures per product for the order. eVolt (December 2024) compares the system's total VA with the transformer's rating; the sheet shows both and compares nothing.

Wire runs: one row per run from the transformer, with its tap voltage, the wire's gauge and the maker's wire constant (eVolt: 7,490 for 12 gauge), its one-way length and the watts on it (the fixtures table's total for that run). The sheet gives eVolt's voltage drop, watts x length in feet / constant, and the voltage at the last fixture, as plain numbers; eVolt's guidance is above 10 V, confirmed with a voltmeter.

Transformers: as their labels print them, with where they mount (Corona: 5 ft from a pool or spa, 10 ft from a fountain). The 120 V side is an electrician's work: in Quebec, the RBQ requires the appropriate licence for electrical installation work; in the US, check what your state or city requires. Call Info-Excavation or 811 before trenching. No price, nothing sized.

Sources

eVolt, load and wire size Manufacturer dataCalculating project load and wire size (landscape lighting), eVolt (a low-voltage landscape lighting maker), PDF of December 2024. Checked Oct 16, 2026
Corona Lighting, T-LT75 sheet Manufacturer dataLow voltage landscape lighting transformers, installation instruction sheet, model T-LT75, Corona Lighting (the maker), sheet of April 2024. Checked Oct 16, 2026
VOLT, LOWTR-100W-SS instructions Manufacturer dataLow voltage landscape transformer, installation instructions, item LOWTR-100W-SS, VOLT Lighting (the maker; the copy a retailer hosts), installation instructions read 2026-10-16. Checked Oct 16, 2026
811 (US) Trade association811 Before You Dig, Common Ground Alliance, current page. Checked Oct 7, 2026
RBQ, electrical work licence GovernmentElectricity: licence (your obligations to the RBQ), Régie du bâtiment du Québec, web page read 2026-10-16. Checked Oct 16, 2026
Info-Excavation Trade associationDemande de localisation : questions fréquentes, Info-Excavation, current page. Checked Oct 7, 2026