The best vanity lighting for a windowless bathroom

What to look for, in order

1. Light from the sides, then above. A single fixture over the mirror casts shadows down the face — under the eyes, the nose and the chin. A pair of sconces at roughly eye level fills them. If you can only have one fitting, a wide bar with diffusing shades is the next best thing.
2. CRI 90 or better. With no daylight, nothing corrects a bulb that renders color badly. Both 60-watt-replacement globes here publish 90; the sensor mirror publishes 95.
3. Total lumens, counted honestly. Add up what the fixtures actually deliver rather than what the fitting looks like it should. A three-light bar with 250-lumen bulbs is dimmer than a two-light sconce with 500-lumen ones.
4. A damp rating. Both Kohler fixtures publish “Suitable for damp locations, per UL 1598”. In a windowless bathroom, moisture leaves more slowly, so this is not a formality. Ventilation is the other half of that problem.
5. The socket. E26 medium takes G25 globes; E12 candelabra takes B10 or T10. Buying the wrong base is the commonest mistake in this category.

Why a windowless bathroom is a harder lighting problem

A room with a window gets a free, perfectly color-rendered light source for most of the day, and your eyes use it as a reference. Take it away and three things change: color judgments at the mirror depend entirely on the bulb, the room feels smaller because there is no bright surface at its edge, and there is no cue that the extractor has cleared the air.

The first is solved with CRI, the second with light on the walls rather than only on the floor, and the third is not a lighting problem at all. Fan against window is compared here.

Layer it: three jobs, not one

Task light at the mirror, from the sides where possible. Ambient light so the room is not lit only at the vanity — usually the existing ceiling fitting, which is fine for this job and bad for the other two. A night option, because an interior bathroom at 3 a.m. is genuinely dark. The night lights are ranked here.

Where sconces go, and how much wall they need

Side lighting only works if the fittings are roughly at face height and far enough apart to clear the mirror. The published dimensions tell you whether your wall can take it: the Memoirs sconce is 15-1/8 in. wide and stands 7-3/16 in. from the wall on a 5 in. square backplate, so a pair either side of a mirror needs about 30 in. of wall plus the mirror between them.

Projection is the number that catches people out in a small room. Seven inches of fitting sticking out beside a basin is fine on a wide wall and an obstacle in a 3 ft alcove. The bar is the alternative there: the Simplice publishes 5-9/16 in. of projection and puts all its width above the mirror instead of beside it. Sizing a fixture to a mirror is here.

Adding up the lumens before you buy

Fixtures do not publish output; bulbs do. That means the only honest way to know what a fitting will deliver is to multiply the sockets by the bulb you intend to put in them.

Two sockets with 500-lumen globes is 1,000 lumens at face height. The same fitting with the 250-lumen decorative bulbs is 500. A three-light bar with 500-lumen candelabra bulbs is 1,500 if the sockets take them — and on the Simplice they do not, because it publishes E12 candelabra with “type B10 or T10 bulbs recommended”.

The Memoirs sconce publishes a socket rating of “60 Hz, 60 W, 1600 Lumens”, which is a ceiling rather than an output: it is the most bulb the fitting will take, not what it gives you.

Damp rating, and why it matters more here

Both Kohler fittings publish “Suitable for damp locations, per UL 1598”. In a bathroom with a window, moisture leaves on its own; in one without, it leaves through the extractor or not at all, and fittings spend longer in humid air.

Neither GE bulb publishes a damp rating, which is normal for a bulb and worth knowing if you are putting one in an enclosed shade. If ventilation is the underlying problem, no light fixes it. Sensing fans against timers is compared here.

If you cannot rewire

Plenty of windowless bathrooms have exactly one ceiling box and a tenancy agreement. The bulb and the sensor mirror are the two picks here that need no electrician and no permission: better color rendering overhead, and a properly lit face at the basin. The renter-safe mirror upgrades are here.

Switches, and the order they get pressed in

In a windowless bathroom the first switch someone finds at night is the one that matters. If the ceiling light and the vanity lights are on separate switches, put the softer one nearest the door — nobody wants 1,000 lumens at face height at three in the morning.

One more reason to fix the light here first

In a room with no window, the light is also the only thing telling you the room is clean. Grout, limescale on the glass and marks on a mirror all disappear under a single dim ceiling fitting and all show up under 1,000 lumens at CRI 90. That is either an argument for better light or an argument against it, depending on the week.

What we would not do

Fit one very bright ceiling light and call it done. More lumens from directly above deepens the shadows rather than removing them.

Buy a fixture without checking its damp rating. In a room with no window, humidity lingers.

Mix color temperatures in one fitting. It looks like a fault, and in a windowless room there is no daylight to disguise it. Soft white against daylight is here.