10 Lighting Design Mistakes That Make a Renovation Look Cheap
The biggest lighting mistakes are: relying on a single overhead fixture, mixing color temperatures (2700K and 4000K in the same room), oversizing pendants, skipping under-cabinet lighting, forgetting dimmers on every circuit, and hanging chandeliers at the wrong height.
The 10 most common mistakes
1) Single overhead fixture lighting an entire room. 2) Mixing 2700K and 4000K bulbs. 3) Recessed cans on a grid pattern instead of placed where light is needed. 4) No under-cabinet lighting in the kitchen. 5) Pendants too high above an island. 6) Bathroom vanity lit only from above (creates raccoon shadows). 7) No dimmers. 8) Single switch for all overhead lights — no zones. 9) Visible bulbs in clear-glass fixtures (uncomfortable glare). 10) No accent or art lighting.
The fix: layered lighting
Every room needs three layers — ambient (overhead), task (under-cabinet, vanity, reading), and accent (sconces, picture lights, uplights). Use one consistent color temperature (2700K or 3000K) throughout the home. Every circuit on its own switch and a dimmer.
Kitchen lighting done right
Recessed cans (4-inch, 2700K, 90+ CRI) every 4–5 feet. Dedicated under-cabinet LED strips on a separate switch. Pendants over the island sized 1/3 the island width per pendant, hung 30–36" above the counter. Decorative ceiling fixture over the breakfast nook or sink.
Bathroom lighting done right
Sconces or vertical bars on either side of the mirror at face height — never an overhead-only setup. A wet-rated 4-inch can over the shower. A decorative center fixture for ambient. All on dimmers.
Color temperature and CRI
2700K (warm) for living, dining, bedrooms. 3000K (slightly crisper) for kitchens and baths. Never 4000K+ in residential — it makes any room feel like an office. CRI 90+ everywhere — it's the difference between food/skin/wood looking right or looking off.
Frequently asked
What color temperature is best for a home?
2700K for living and sleeping spaces, 3000K acceptable for kitchens and bathrooms. Avoid anything 4000K or higher in residential settings — it reads commercial and unflattering.
How high should pendants hang over a kitchen island?
30–36 inches from the top of the island counter to the bottom of the pendant. Higher and they lose scale; lower and they block sightlines.
Do I need under-cabinet lighting?
Yes — it's the single most-missed lighting upgrade and the easiest to add during a remodel. Counter task lighting is essential for prep and dramatically lifts the look of the kitchen at night.
Should every room have dimmers?
Yes. Dimmers cost $25–$60 each installed and let one fixture serve multiple moods (full prep brightness vs. evening ambient). The single highest-impact lighting upgrade for the price.
How many recessed lights does a kitchen need?
Plan one 4-inch can every 4–5 feet on center, placed where light is actually needed (over counters, in the walkway), not on a rigid grid. A typical 12×15 kitchen needs 6–10 recessed cans.
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