Bathroom Lighting

Plan for 70 to 80 lumens per square foot in task zones and 20 to 50 lumens per square foot for ambient-only areas. A standard 50 square foot bathroom needs 3,500 to 4,000 total lumens across all layers. At a single-sink vanity, the American Lighting Association recommends 1,600 to 3,000 lumens from the mirror fixtures alone. A double-sink vanity needs 3,000 to 4,000 lumens. Layer a damp-rated ceiling fixture for ambient, sconces or a vanity bar for task, and optional accent strips under the vanity.

3000K to 3500K is the sweet spot for daily grooming: warm enough to feel comfortable, cool enough for accurate color. Powder rooms and spa-style soaking tubs work better at 2700K to 3000K for a calmer mood. If you apply makeup professionally, consider 4800K to 5000K daylight-match bulbs with CRI 95+ so foundation and concealer read true. Keep CRI at 90 or higher on any vanity bulb so skin tones are not washed out.

Center flanking sconces at 60 to 66 inches from the finished floor, with 65 inches as the most common recommendation. Space them 36 to 40 inches apart, positioning each sconce 4 to 5 inches from the mirror edge. This height places the light source at average eye level, which eliminates the under-eye and chin shadows a single overhead bar creates. For vanities used by adults of different heights, 64 inches is a good compromise.

Size the vanity bar to approximately 75 percent of the mirror width, or about 4 inches less than the vanity itself. A 30-inch mirror takes a 22 to 24 inch bar. A 48-inch mirror takes a 36 inch bar. Mount the fixture 75 to 80 inches from the floor so the bottom of the shade clears the top of the mirror by 3 to 8 inches. On wide double vanities, two shorter bars centered over each sink often light more evenly than one long fixture.

Any fixture at the vanity or on the bathroom ceiling should carry a damp-location UL rating. Fixtures inside the shower or tub spray zone must be wet-location rated. NEC 410.10(D) defines the exclusion zone as 3 feet horizontally and 8 feet vertically from the tub rim or shower threshold: no pendants, chandeliers, track heads, or cord-hung fixtures are allowed inside that envelope. Recessed wet-rated LED downlights and wet-rated surface-mount fixtures are the only legal options inside the zone.

Hang bathroom pendants 30 to 36 inches above the counter surface, measured from the bottom of the shade. This keeps the light out of the sightline when standing at the sink while still illuminating the face and countertop. Pendants flanking a mirror should center at 60 to 66 inches from the floor, the same as sconces. Confirm damp-rated construction, since many decorative pendants are dry-location only and not rated for bathroom humidity.

Yes, but placement is restricted. NEC 410.10(D) prohibits chandeliers within 3 feet horizontally and 8 feet vertically of a bathtub rim or shower threshold. A chandelier centered over a freestanding tub is legal only if it clears that 3-by-8-foot envelope, which usually requires at least a 9-foot ceiling. The fixture must be damp-rated at minimum. If any part of it falls inside the spray zone, it needs a wet-location rating, which most chandeliers do not carry.

90 CRI minimum for any vanity bulb. CRI measures how accurately a light source renders colors compared to natural daylight. Below 90, skin tones look flat and foundation shades are hard to match. For dedicated makeup lighting, look for CRI 95+ and an R9 value above 50, which specifically measures how well the bulb renders saturated reds and skin undertones. Most integrated LED vanity bars list CRI on the spec sheet.

Flanking sconces at 60 to 66 inches from the floor give the most even, shadow-free light for grooming because they cross-light the face from both sides. A backlit mirror creates ambient glow around the perimeter but does not deliver enough direct lumens for tasks like shaving or detailed makeup. The best setup is both: sconces or a vanity bar for task light at 3000K to 3500K, plus a backlit mirror for ambient fill and nightlight duty at 2700K.

Match the dimmer type to the LED driver. Most hardwired LED vanity fixtures use TRIAC (forward-phase) or ELV (reverse-phase) drivers. Check the fixture spec sheet for the recommended dimmer list. Standard incandescent dimmers cause LED flicker at low levels. Budget $25 to 50 per dimmer switch and confirm the VA rating covers total wattage. Warm-dim LEDs that shift from 3000K down to 2200K as you dim are ideal for bathrooms that double as nighttime relaxation spaces.