LED Recessed Light Placement Guide: Spacing, Layout, and Selection
How to plan recessed LED lighting layouts — proper spacing formulas, avoiding common placement mistakes, choosing the right size and trim, and dimmer requirements.
Basic Spacing Rule
The standard spacing formula: divide ceiling height by 2 to get the spacing between lights and from the wall to the first light. For an 8-foot ceiling: space lights every 4 feet; keep lights 2 feet from walls. For 9-foot ceilings: space 4.5 feet apart. This formula creates even illumination without hotspots or dark corners for general ambient lighting.
Light Size Selection
- 4-inch recessed lights: For accent lighting (artwork, shelves), task lighting under cabinets, or lower ceilings. More can lights needed for equivalent coverage.
- 6-inch recessed lights: Standard for general room lighting. Best balance of light spread and fixture visibility. Most common choice for residential applications.
- 8-inch recessed lights: For large rooms with high ceilings (10+ feet) or high-lumen applications. Fewer fixtures needed but each is more visible.
Beam Angle and Light Quality
Standard flood trim (110–120° beam angle) provides broad, even coverage for general lighting. Spot trim (30–40°) is for accent lighting. Adjustable gimbal trim allows directional control — good for accent or artwork lighting. Look for: CRI 90+ for accurate color rendering, CCT of 2700K–3000K for most living spaces.
Common Placement Mistakes
- Placing lights too close to walls: creates "scalloping" shadow patterns down the wall
- Insufficient lights: underlit rooms feel dim and cave-like
- Over-lighting: too many lights creates a harsh, commercial feel
- Centering only on the room: work from furniture layout — light should fall where activities happen
- Forgetting dimmer switches: recessed lighting without dimmers is inflexible for mood and energy savings