Bathroom Vanity Light Size Guide: Width, Height & Spacing Calculator
A bathroom vanity light that's too narrow, mounted too low, or spaced too tight leaves half your face in shadow at the mirror. Getting the width, height and spacing right - relative to your mirror, not just the wall - is what makes vanity lighting actually flattering. This guide covers the standard designer rule for bathroom vanity lighting, and the calculator below turns your own mirror measurements into exact numbers.
How to size bathroom vanity lighting
The two numbers that matter are your mirror or vanity width and your counter height - the fixture is planned around the mirror, not the room. Measure the mirror's width and the height from the floor to the vanity counter top, then use the calculator or the rules below.
What size vanity light do I need?
As a rule of thumb, a single light bar or a combined pair of sconces should span about 65-75% of the mirror's width, centered above it - wide enough for even, shadow-free light across the whole face, narrow enough to stay proportional to the mirror. Mount the fixture so its center sits around 65-72 inches from the floor, roughly at eye level for most adults.
Bathroom vanity light calculator
Enter your mirror width and vanity height to get the exact fixture width, mounting height and sconce spacing for your bathroom.
Vanity light placement & spacing
- Above the mirror - a single horizontal bar or flush fixture mounted directly above the mirror's frame, centered on its width.
- Flanking the mirror - two vertical sconces mounted on either side, spaced about the mirror's width plus 8 inches apart, centered at eye level for even, shadow-free light on both sides of the face.
- Combining both - side sconces plus a smaller overhead fixture gives the most even, professional-quality light for makeup and grooming.
Vanity light styles & finishes
- LED mirror lights - integrated or mirror-front fixtures for a clean, modern, energy-efficient look.
- Crystal & glam sconces - statement fixtures that double as bathroom decor, well suited to a primary suite.
- Brass & warm metal finishes - a classic, elevated look that pairs well with marble or stone vanities.
- Matte black & industrial - a graphic, high-contrast look for modern and minimalist bathrooms.
Frequently asked questions
How wide should my vanity light be? About 65-75% of your mirror's width, centered above it.
How high should vanity lights be mounted? Around 65-72 inches from the floor, roughly at eye level.
Should I use one fixture or two sconces? A single bar above the mirror is simple and works well for smaller mirrors; two sconces flanking the mirror give more even, shadow-free light for larger mirrors or makeup application.
How far apart should two vanity sconces be? About the mirror's width plus 8 inches, center to center, so they sit just outside the mirror's edges.
What if my vanity is taller or shorter than standard? Adjust the mounting height proportionally - taller vanities call for slightly higher fixture placement, and shorter vanities slightly lower.
Explore bathroom lighting at Mirodemi
Browse the full range: Bathroom Lights and Fixtures, Wall Sconces, Crystal Wall Sconces and Hallway Light Fixtures. Need help planning your layout? Get a free design consult.