Pot Light Layout Calculator

Number of Lights Formula:

\[ \text{Number of Lights} = \frac{FC \times \text{Area}}{\text{Lumens per Light}} \]

Number of Lights:

Definition: This calculator estimates the number of pot lights needed based on desired illuminance, room area, and light output.

Purpose: It helps homeowners and electricians determine how many pot lights are required for optimal room lighting.

The calculator uses the formula:

\[ \text{Number of Lights} = \frac{FC \times \text{Area}}{\text{Lumens per Light}} \]

Where:

Explanation: The total required lumens (FC × Area) is divided by the output of each light to determine how many are needed.

Details: Correct lighting ensures adequate illumination for tasks, creates desired ambiance, and avoids over-lighting which wastes energy.

Tips: Enter the desired illuminance (FC), room area (ft²), and lumens per light (default 800 lm). All values must be > 0.

Q1: What's a typical FC value for rooms?
A: Living rooms: 10-20 fc, Kitchens: 30-40 fc, Offices: 50-75 fc, Bathrooms: 70-80 fc.

Q2: How do I measure my room area?
A: Multiply length by width of the room in feet to get square footage.

Q3: Where do I find lumens per light?
A: Check the product specifications of your pot lights (typically 600-1200 lm for LED).

Q4: Should I round up the result?
A: Yes, always round up to the nearest whole number since you can't install a fraction of a light.

Q5: Does this account for light placement?
A: No, this calculates total quantity. Spacing depends on ceiling height and beam angle.