Desk Lighting Without Screen Glare: A Home Office Guide

Most desk lighting advice is about how much light you need. In a room with a screen in it, the harder question is where the light must not go.

Screen glare has two forms. A reflection you can see, where a lamp or window appears mirrored in the display, and a veil you cannot quite identify, where light falling across the screen face washes out the contrast and leaves you squinting at something that is technically bright. The second is more common and more tiring.

The one rule that fixes most of it

Light the desk, not the screen. The lamp head should sit to one side of the monitor, at or slightly above the top of the display, angled down onto the desk surface and away from the screen face.

That single placement does three things at once: it puts light on paper, keyboard and hands where you need it, it keeps the lamp out of the reflective cone of the display, and it keeps the bright source out of your own field of view.

Which side? Opposite your writing hand. A right hander puts the lamp on the left, so the hand does not cast a shadow across whatever it is writing on.

Where the window goes

Daylight causes more screen glare than any lamp, and the fix is geometry rather than equipment.

Best: the window to the side of the desk, so light crosses the desk rather than hitting the screen or your eyes.

Worst: the window behind the screen, so you spend the day looking at a bright rectangle with a dim screen in front of it, and your pupils close down against the window while trying to read the display.

Also bad: the window directly behind you, which mirrors the whole window in the screen.

If the desk cannot move, a light curtain or a blind that diffuses rather than blocks will do more for daytime comfort than any lamp.

Never work with only a desk lamp

This is the mistake that causes evening eye strain. One bright pool on the desk in an otherwise dark room forces your eyes to adapt constantly between the lit desk, the lit screen and the dark room behind.

Keep the room around the desk at roughly a third of the brightness of the task area. That can be a floor lamp in the corner, a wall light, or a lamp bounced off the wall behind the monitor. Light on the wall behind the screen is especially effective, because it reduces the contrast between the display and its surroundings, which is the thing your eyes are working against.

The principle generalises, and we cover it in layered lighting.

Numbers worth knowing

• 300 to 500 lux on the desk surface for general work. Toward 500 for detailed work or older eyes, which need roughly twice the light at 60 that they did at 20.
• 400 to 600 lumens from the task lamp is usually enough to hit that, because the lamp is close to the surface.
• 4000K during the day, 2700K to 3000K in the evening. Neutral white keeps you alert while the sun is up. Warm white at night does not fight your sleep. A lamp that can switch between the two is genuinely useful here, which is not true in most rooms. See warm white or cool white.
• CRI 90 or above if you work with colour, images or fabric.

What to look for in the lamp itself

An adjustable head, and a real one. The whole method depends on aiming the light down and away. A fixed shade pointing wherever the designer decided cannot do that. The Pivot Adjustable Lamp and the Halo Desk Lamp both tilt properly.

An opaque shade. A translucent shade glows across your whole field of view, which is the opposite of what a task lamp should do. You want the light on the desk and the lamp itself visually quiet.

A deep shade or a recessed source. If you can see the bulb from a normal seated position, you will see it all day. Look at the fitting from where you actually sit before deciding.

Dimming. The right brightness at 10am and at 9pm are not the same number.

A footprint you can live with. A heavy round base eats desk space. A clamp mount gives the whole surface back, and a lamp that also charges a phone, like the Grove Wireless Charging Lamp, removes a cable at the same time.

Two quick tests

The black screen test. Turn the monitor off and look at the dark glass from your normal seated position. Every bright thing you can see reflected in it is a source of glare during the day. Move the lamp, or the screen, until the reflections are gone.

The hand shadow test. Put your writing hand on the desk as if writing. If it casts a shadow over the page, the lamp is on the wrong side.

Frequently asked questions

Where should a desk lamp go to avoid screen glare?

To one side of the monitor, at about the height of the top of the screen, angled down onto the desk and away from the display. Put it on the opposite side to your writing hand.

How bright should a desk lamp be?

Aim for 300 to 500 lux on the desk, which a 400 to 600 lumen task lamp will usually provide because it sits close to the surface.

Should I work with just a desk lamp?

No. A bright desk in a dark room is what causes evening eye strain. Keep the surrounding room at roughly a third of the task brightness, ideally with some light on the wall behind the screen.

What colour temperature is best for a home office?

Around 4000K during the day and 2700K to 3000K in the evening. A tunable lamp is worth it here even though it rarely is elsewhere.

Where should the desk go relative to the window?

With the window to the side. A window behind the screen makes you fight a bright background all day, and a window behind you reflects straight into the display.

Browse the table lamps collection for adjustable heads and opaque shades.