How far apart should recessed lights be?

The general rule is to space recessed lights at a distance equal to half the ceiling height. For an 8-foot ceiling, space lights 4 feet apart. For task lighting, use ceiling height divided by 3, and for accent lighting, ceiling height divided by 4.

How many recessed lights do I need per room?

It depends on room size and ceiling height. The general formula is to divide your room into an equal grid based on the spacing rule (ceiling height / 2 for general lighting). This calculator does the math for you — just enter your room dimensions.

How far should recessed lights be from the wall?

Place the first recessed light at half the distance of the spacing between lights. For example, if your lights are spaced 4 feet apart, the first light should be 2 feet from the wall. This prevents dark edges along the walls.

What size recessed lights should I use?

Use 4-inch recessed lights for task and accent lighting, and 6-inch for general ambient lighting. 4-inch lights are the most popular choice for modern homes because they provide focused light without overwhelming the ceiling.

Can you have too many recessed lights?

Yes, over-lighting a room creates harsh glare and wastes energy. Follow the spacing guidelines based on your ceiling height and always install dimmer switches so you can adjust brightness to the occasion.

Do recessed lights need to be evenly spaced?

Yes, even spacing is important for uniform light distribution. Uneven spacing creates dark spots and hot spots that make a room feel unbalanced. Use a consistent grid pattern for the best results.

Recessed Lighting Calculator

Calculate how many recessed lights you need and the optimal spacing for any room. Supports general, task, and accent lighting. Free, no signup required.

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