1. What is an LED Power Consumption Calculator?

Definition: This calculator determines the power consumption of an LED system based on voltage and current.

Purpose: It helps electrical engineers, designers, and DIY enthusiasts calculate the power requirements for LED circuits.

2. How Does the Calculator Work?

The calculator uses Ohm's Law formula:

Where:

• \( P \) — Power (watts)
• \( V \) — Voltage (volts)
• \( I \) — Current (amperes)

Explanation: The voltage across the LED is multiplied by the current flowing through it to determine power consumption.

3. Importance of Power Calculation

Details: Accurate power calculation ensures proper power supply sizing, thermal management, and energy efficiency in LED systems.

4. Using the Calculator

Tips: Enter the voltage across the LED and the current flowing through it. Both values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What's typical voltage for LEDs?
A: Most single LEDs operate at 2-3.5V, while LED arrays may operate at higher voltages (12V, 24V, etc.).

Q2: How do I measure current?
A: Use a multimeter in series with the LED circuit to measure current in amperes.

Q3: Does this account for driver efficiency?
A: No, this calculates only the LED power. Add 10-20% for driver losses in complete systems.

Q4: Can I use this for AC LED systems?
A: For AC systems, use RMS voltage and current values for accurate calculations.

Q5: How does power relate to brightness?
A: Generally, higher power means brighter output, but efficiency (lumens per watt) varies by LED type.