⚡ Architectural Lighting Voltage Drop & Load Calculator
Use this professional engineering tool to accurately size power supplies, main cables, and power distribution topologies for your LED facade and linear lighting projects.
📖 How to Use the Calculator:
Select System Voltage: Choose between 24V or 48V DC architectures depending on your project specifications.
Choose Fixture Type: Select standard RGB (13W) or Single Color (10W) fixtures, or input custom wattages.
Configure Power Feed Topology:
End-Fed: Power injected at the start of the fixture run.
Center-Fed / Dual End-Fed: Power injected in the middle or both ends, effectively halving the voltage drop across the run.
Select Driver Power & Review Quantity: Choose your driver wattage. The calculator automatically calculates the maximum safe fixture quantity based on electrical standards. You can also type a custom fixture count to see the minimum required driver size.
Adjust Cable Parameters: Input the Driver to First Light Cable Length and select the appropriate Driver to Light Cable thickness ($\text{mm}^2$) to ensure stable power delivery.
🛡️ Built-in Engineering Standards:
The 80% Safety Rule: To ensure long-term driver reliability and prevent thermal overload, total fixture loads are automatically restricted to a maximum of 80% of the driver’s rated capacity.
Voltage Drop Protection: The tool monitors the Last Light Voltage in real-time. It enforces strict compliance thresholds (maintaining a minimum of 24V for 48V systems and 20V for 24V systems) to prevent LED dimming, color shifting, or signal degradation.
Interconnect Resistance: Automatically calculates voltage losses across jumper cables between consecutive fixtures based on your selected Light Length and interconnect wire size.
💡 Pro Tip for Long Runs: If you see a voltage warning on long facade runs, switch from End-Fed to Center-Fed, shorten the driver distance, or upgrade your main cable thickness to maintain stable performance without reducing your fixture count.
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