Power Calculation Formula:
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Low voltage lighting (typically 12V or 24V) is commonly used in residential applications for accent lighting, landscape lighting, and other decorative purposes. It's energy-efficient and safer than standard line voltage lighting.
The calculator uses the simple power equation:
Where:
Explanation: This calculation helps determine the total power requirement for your low voltage lighting system, which is essential for proper transformer sizing.
Details: Accurate power calculation ensures you select the right transformer size and prevents overloading your low voltage system. It also helps with energy efficiency planning.
Tips: Enter the number of lights and the wattage per light (usually marked on the bulb or fixture). All values must be valid (number > 0, wattage ≥ 0).
Q1: What's the advantage of low voltage lighting?
A: Benefits include energy efficiency, longer bulb life, safer installation, and better light quality for accent lighting.
Q2: How much can I run on one transformer?
A: The total wattage of all lights should not exceed 80% of the transformer's rated capacity to prevent overheating.
Q3: What about voltage drop in long runs?
A: This calculator gives total power. For long wire runs, you may need to account for voltage drop by using thicker gauge wire or multiple transformer locations.
Q4: Can I mix different wattage lights?
A: Yes, but you'll need to calculate each type separately and sum the totals for proper transformer sizing.
Q5: What's typical wattage for low voltage lights?
A: Common values range from 4W for LED path lights to 50W for halogen spotlights. Modern LEDs typically use 4-15W per fixture.