1. What is the Energy Calculation Formula?

The energy calculation formula \( P = V \times I \times t / 3600 \) computes the energy consumption in watt-hours (Wh) for a constant voltage LED driver over a specified time period. This helps in estimating power requirements and operating costs.

2. How Does the Calculator Work?

The calculator uses the energy calculation formula:

Where:

• \( P \) — Energy in watt-hours (Wh)
• \( V \) — Voltage in volts (V)
• \( I \) — Current in amperes (A)
• \( t \) — Time in seconds (s)

Explanation: The formula calculates energy by multiplying power (voltage × current) by time, then converting from joules to watt-hours by dividing by 3600 (seconds in an hour).

3. Importance of Energy Calculation

Details: Accurate energy calculation is crucial for designing LED lighting systems, estimating power consumption, calculating operating costs, and selecting appropriate power supplies.

4. Using the Calculator

Tips: Enter voltage in volts, current in amperes, and time in seconds. All values must be positive numbers. The calculator will compute the energy consumption in watt-hours.

5. Frequently Asked Questions (FAQ)

Q1: Why divide by 3600 in the formula?
A: We divide by 3600 to convert from joules (V×A×s) to watt-hours (Wh), since 1 Wh = 3600 joules.

Q2: Can I use this for AC LED drivers?
A: This formula works for DC or constant voltage applications. For AC, you would need to consider power factor and RMS values.

Q3: What's a typical voltage for LED drivers?
A: Common constant voltage LED drivers output 12V or 24V DC, though other voltages are available.

Q4: How accurate is this calculation?
A: It's theoretically accurate for ideal conditions. Real-world efficiency losses in the driver and LEDs may affect actual consumption.

Q5: Can I calculate cost from this result?
A: Yes, multiply the energy in Wh by your electricity rate (per kWh) and divide by 1000 to get cost.