1. What is a Pixel Power Supply Calculator?

Definition: This calculator estimates the power supply wattage needed for pixel lighting systems based on the number of pixels and their individual power consumption.

Purpose: It helps lighting designers and installers determine the appropriate power supply size for LED pixel installations with a 20% safety margin.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( P_{supply} \) — Required power supply wattage (watts)
• \( N \) — Number of pixels in the system
• \( P_{pixel} \) — Power consumption per pixel (watts)
• \( 1.2 \) — 20% safety margin factor

Explanation: The total pixel wattage is calculated and then increased by 20% to account for power supply efficiency and safety headroom.

3. Importance of Proper Power Supply Calculation

Details: Correct power supply sizing ensures reliable operation, prevents overheating, and extends the life of both the pixels and power supply.

4. Using the Calculator

Tips: Enter the number of pixels and wattage per pixel (default 0.3W). All values must be > 0. The calculator automatically adds the 20% safety margin.

5. Frequently Asked Questions (FAQ)

Q1: Why is there a 20% safety margin?
A: The margin accounts for power supply efficiency losses, voltage drop in wiring, and provides headroom for reliable operation.

Q2: What's a typical wattage per pixel?
A: Most LED pixels consume 0.2W-0.5W each when at full brightness (white), with 0.3W being a common average.

Q3: Should I round up the calculated wattage?
A: Yes, always round up to the nearest available power supply wattage for additional safety.

Q4: Does this account for voltage drop?
A: No, for long cable runs, you may need additional power injection points beyond what this calculator suggests.

Q5: Can I use multiple smaller power supplies?
A: Yes, you can divide the total wattage across multiple power supplies, keeping each below 80% of its rated capacity.