How to Choose the Right Recessed Downlight

Why Recessed Downlights?

Recessed downlights, also called can lights, deliver clean, unobtrusive illumination without taking up visual space on the ceiling. They are perfect for general lighting, task lighting, and accent lighting in both residential and commercial settings.

Step 1: Choose the Right Size

Recessed lights come in standard sizes measured by the diameter of the opening: 2", 3", 4", 5", and 6" are most common. Smaller trims (2"-3") work well for accent and task lighting, while larger trims (5"-6") provide broader general illumination. For 8-foot ceilings, 4" trims are a popular choice.

Step 2: Understand IC vs. Non-IC Ratings

IC-rated (Insulation Contact) housings can be installed directly against attic insulation, which is required in most modern homes. Non-IC housings need clearance from insulation. Always check your local building codes and choose IC-rated when in doubt.

Step 3: Pick the Right Beam Angle

Narrow beam angles (15-25 degrees) create focused spotlights ideal for highlighting artwork or architectural features. Medium beams (35-50 degrees) suit task areas. Wide beams (60+ degrees) are best for general ambient lighting.

Step 4: Consider Dimming Compatibility

Not all LED downlights dim smoothly with every dimmer switch. Look for fixtures labeled "0-10V dimmable" or "TRIAC dimmable" and pair them with compatible dimmers. This ensures flicker-free dimming down to low levels.

Step 5: Color Temperature & CRI

Choose a color temperature that matches the room (see our LED Color Temperature Guide). Aim for a CRI of 90 or above for accurate color rendering, especially in kitchens, bathrooms, and retail displays.

Final Tips

Space your downlights evenly — a common rule of thumb is to place them half the ceiling height apart. For an 8-foot ceiling, that means roughly 4 feet between each light. Always plan your layout before cutting holes!