Lighting
LED Strip Voltage Loss Calculator
This calculator evaluates voltage loss for a single lighting scenario. It uses strip current and feed resistance and shows the equation behind the displayed value.
Enter values for Voltage loss
Do not mix values recorded under different conditions.
Values this page needs
Keep lumens, candela, lux, and foot-candles on the correct geometric basis. Nameplate and meter values are not interchangeable unless they describe the same condition.
Convert units once, retain the original reading, and verify the converted magnitude. For a downstream contact power loss value, open Contact Resistance Loss Calculator.
- Strip current
- Default example: 5 A. Enter strip current in A.
- Feed resistance
- Default example: 0.3 Ω. Enter feed resistance in Ω.
Understanding the equation
Here, Voltage loss is obtained from Vloss = I × R. Only Strip current and Feed resistance enter the numerical result.
The initial scenario returns 1.50 V. Re-enter field data before using the answer in a design or comparison.
Calculate voltage loss from strip current and feed resistance. For strip power, use LED Strip Power Calculator.
Applying the result
Read Voltage loss as the outcome of this equation, not as automatic equipment approval. Compare it with illuminance, uniformity, driver loading, voltage loss, energy use, and maintained output.
Store the measurement state and conversion notes with the answer.
Transferring the result
Archive strip current and feed resistance with voltage loss. Identify the instrument, rating, or assumption behind each entry.
Carry voltage loss before applying any display rounding. Keep a separate displayed value if reporting precision differs.
Where this estimate can fail
Both positive and return conductors contribute.
A broader analysis may require driver efficiency, optical loss, surface reflectance, and beam-edge definition. Do not hide omitted behavior inside an unexplained correction factor.
Keep lumens, candela, lux, and foot-candles on the correct geometric basis.
Trace the result back to its source
Begin by confirming feed resistance at the operating point represented by the other entries. Record whether it came from a meter, nameplate, data sheet, or design assumption.
After calculating voltage loss, compare its magnitude with the fixture photometric file and the measured task plane. An independent order-of-magnitude check can reveal a misplaced decimal or unit prefix.
If uncertainty remains, calculate labeled low and high cases. Include daylight variation, control behavior, depreciation, and spatial uniformity when those effects can change the decision.
Before relying on the answer
What assumptions affect Voltage loss?
The result follows the displayed variables. Check fixture distribution, reflections, mounting, maintenance, and meter position separately.
Why does the field result disagree with this page?
Differences can come from daylight variation, control behavior, depreciation, and spatial uniformity, measurement uncertainty, or values taken under different conditions.