Recessed Lighting Layout: How Many Lights and Where to Put Them

Badly laid out recessed lighting is worse than the single ceiling fixture it replaced. Too many lights in a grid makes a living room feel like a car park; too few leaves the counters you actually use in shadow.

The spacing starting point

A reasonable rule: divide the ceiling height by two to get your spacing in feet. An eight-foot ceiling suggests roughly four feet between lights. It's a starting point, not a law — the real question is what you're lighting.

Light the work, not the room

The most common mistake is treating the ceiling as a grid to be filled evenly. In a kitchen, the lights want to be over the front edge of the counter, not centred in the room, because a light directly overhead puts your own shadow on the work surface. In a living room, ambient light around the perimeter beats a grid of downlights in the middle.

Colour temperature

• 2700K — warm, close to incandescent. Living rooms, bedrooms, dining.
• 3000K — the most flexible. Kitchens, bathrooms, hallways, open plan.
• 3500K–4000K — neutral to cool. Garages, workshops, laundry, task areas.
• 5000K+ — daylight. Fine in a workshop, harsh almost everywhere else in a home.
• Pick one temperature per open sightline. Mixed temperatures in one visual space look like a mistake because they are one.

Trim, beam angle and glare

Deeper baffle trims cut glare noticeably compared to flat lens trims, which matters in rooms with low ceilings where the light source is closer to eye level. Narrow beam angles pool light dramatically; wide angles wash evenly. Most rooms want wide, with narrow reserved for art or a specific feature.

Dimming is not optional

Recessed lighting without a dimmer is a room with one setting. Use an LED-rated dimmer matched to the fixture — the majority of flickering complaints we get in Massachusetts homes come down to an old incandescent dimmer left in place after an LED retrofit.