Curated Essential Insights
Explore Key Topics

Lighting & Electrical Load Calculators

Precision landscape lighting tools for footcandle levels, fixture spacing, and voltage drop. Calculate transformer loads, solar feasibility, and energy costs.

Luminaire Data
0.50–0.80 typical
Typical 0.70–0.85
Average Illuminance
–
lux
Footcandles
–
fc
Total Luminous Flux
–
lm
Target Illuminance
–
lux
Target Compliance
Standard Compliance
StandardTarget (lux)CalculatedStatus
Illuminance formula: E = (N × Φ × CU × LLF) / Area. Footcandles = Lux / 10.764. Ensure uniformity is checked independently via lighting software.
Fixture Parameters
Recommended Pole Spacing
–
m (between adjacent poles)
Fixtures Required
–
nr
Average Illuminance
–
lux
Uniformity Ratio (Emin/Eavg)
–
ratio
S/H Ratio
–
Spacing/Height
Illuminated Length
–
m
Estimates assume standard light distribution (CU~0.65, LLF~0.80). Recommended spacing S = (Lumens×CU×LLF) / (TargetLux × PathWidth). Uniformity ratio is indicative and should be verified with photometric software.
Cable Parameters
LED typical 0.90–0.97
Voltage Drop
–
%
Line Current
–
A
Voltage Drop
–
V
Max Safe Length
–
m (for 3% drop max)
Recommended Size
–
mm²
Voltage Drop Compliance
I = P / (V × PF). Voltage Drop = I × (ρ / A) × 2L. Resistivity ρ: Copper = 0.0175, Aluminium = 0.028 Ω·mm²/m. Maximum acceptable drop typically ≤3% for lighting (BS 7671) or ≤5% (NEC).
Circuits
Transformer
Circuit Table
Circuit NameFixturesW/fixtureTotal VA
Transformer Loading
–
%
Total Connected Load
–
W
Total Required VA
–
VA (inc. efficiency)
Available Headroom
–
VA (to allowable limit)
Recommended Min Rating
–
VA
Transformer Capacity
PV System
0=N, 180=S (opt. NH)
Peak Power (Capacity)
–
kWp
Annual Generation
–
kWh/yr
Demand Covered
–
%
Annual Saving
–
$/yr
CO₂ Offset
–
kg/yr
Simple Payback
–
years
25-year Net Saving
–
$ value
Battery Storage Recommended
Generation = kWp × PeakSunHours × 365 × (1-Losses) × (1-Shading). Ensure mounting structure is assessed for wind uplift.
Fixture Schedule
Tariff
Annual Energy
–
kWh/yr
Total Connected Load
–
kW
Annual Cost
–
$/yr
After Dimming Cost
–
$/yr
Annual CO₂
–
kg/yr
Cost Saving (Dimming)
–
$/yr
LED vs Traditional Comparison
SystemWattage (kW)Annual kWhAnnual CostCO₂/yr (kg)Saving

CalcType: Professional Landscape Lighting & Electrical Design Solutions — This specialized lighting and electrical load calculator is engineered to provide precise technical verification and design optimization for landscape architects, site engineers, and nighttime design professionals. Our platform integrates advanced modules for calculating uniform illuminance using the lumen method to meet specific footcandle and lux targets, alongside technical fixture spacing analysis based on Spacing-to-Mounting Height (S/MH) ratios and beam angle overlaps at grade. To ensure system longevity and safety, the tool features a robust voltage drop calculator that factors in wire gauge (AWG), conductor materials, and circuit topologies—including Home Run, Daisy Chain, and T-Method layouts—to prevent flickering or premature fixture failure. Beyond basic circuitry, CalcType offers precision sizing for low-voltage transformers with specific safety margins, solar lighting feasibility models based on Peak Sun Hours (PSH), and comprehensive annual energy cost and CO₂ emission comparisons between LED and legacy systems. Whether you are verifying compliance with public safety lighting codes or projecting the Return on Investment (ROI) of a sustainable retrofit, our calculators provide the technical rigor required for high-impact, code-compliant, and energy-efficient outdoor environments. Technical Disclaimer: The electrical calculations and lighting data provided by this tool are intended for preliminary estimation and conceptual design purposes only; all final lighting plans, wire sizing, and transformer loads must be verified by a licensed electrical engineer or certified lighting professional in accordance with the National Electrical Code (NEC) or local jurisdictional safety standards. Actual voltage drop, battery autonomy, and photometric performance may vary based on specific manufacturer data, site environmental conditions, and installation quality; therefore, CalcType assumes no liability for electrical system failure, structural hazards, or financial losses resulting from the use of these tools.