What Daylighting Means in a Home
Daylighting refers to deliberately using natural light as a room's primary daytime light source, arranging windows, furniture, and window treatments so that light reaches the spaces where it's actually useful. Done well, it can reduce how often electric lighting is needed during daylight hours, which may help lower energy use over time, though actual results depend on a home's orientation, climate, window size, and personal habits, so no specific savings figure applies universally.
Good daylighting is about more than brightness. A room that lets in plenty of harsh, direct sun but leaves the rest of the space in comparative shadow isn't necessarily well daylit; it's simply unevenly lit, which is often where glare complaints come from. The U.S. Department of Energy's daylighting guidance frames this as a balance between admitting useful light and controlling its intensity and direction.
Where Glare Actually Comes From
Glare generally falls into two related categories. Direct glare happens when unshaded sunlight falls straight onto a workspace, a screen, or into someone's direct line of sight, creating an uncomfortably bright hotspot. Contrast glare happens when a very bright window sits next to a comparatively dim room, forcing the eyes to constantly readjust between the two brightness levels, which can feel fatiguing even if no single spot is blindingly bright.
Screens are particularly sensitive to both types. A monitor or television facing a window, or positioned so a window is directly behind the viewer, tends to produce reflections or washed-out contrast that makes the screen harder to read. This is one of the most common complaints in home offices and is covered in more detail in improving lighting for video calls and reducing glare without darkening a room.
Diffusing Light With Window Treatments
Sheer curtains and light fabrics
Sheer or lightweight curtains scatter direct sunlight into a softer, more even glow rather than blocking it outright, which is often the most comfortable middle ground for living rooms and bedrooms that still want daylight during the day.
Blinds and adjustable slats
Horizontal or vertical blinds let you angle slats to redirect light toward the ceiling or walls rather than straight into a room, which diffuses direct sun while still admitting brightness. This adjustability makes blinds a flexible option for rooms used for different tasks throughout the day.
Layered treatments
Pairing a sheer layer with a heavier curtain or blind gives the most control: sheers soften daytime glare, while the heavier layer can fully block light for evening privacy or screen-based tasks. Layering window treatments is a similar concept to layering light sources, discussed in ambient, task, and accent lighting layers.
Positioning Desks and Screens Relative to Windows
Where a desk or seating area sits relative to a window often matters more than the window treatment itself. Facing a desk directly into a window tends to create a glare source right at eye level, while sitting with a window directly behind a screen typically causes reflections and makes the screen appear dark by comparison. A side-on position, with the window to the side of the desk rather than in front of or behind the screen, is generally the most comfortable arrangement for reading and screen work, a principle covered further in planning lighting for a home office and the desk lighting guide.
The same logic applies to reading chairs and television placement: positioning seating so daylight supports the task rather than competing with it tends to produce a noticeably more comfortable result than simply adding more light to compensate for a poor layout.
Balancing Daylight With Electric Lighting
Daylight changes throughout the day, so a room that looks perfectly lit at noon may feel dim and contrasty by late afternoon. Rather than relying purely on daylight or purely on electric light, many comfortable rooms use a small amount of supplemental ambient or task lighting even during the day, which helps even out the contrast between a bright window and the rest of the room. Dimmable fixtures are particularly useful here, since they can be adjusted to complement changing daylight rather than overpowering it, a concept explored in creating lighting scenes with dimmers and warm vs. cool light and where each works.
Adjusting for Season and Time of Day
The angle and intensity of sunlight shifts across seasons, so a window treatment setup that works well in winter may feel too bright or too warm in summer. Rooms facing east tend to get strong direct light in the morning, while west-facing rooms often get intense low-angle sun in the late afternoon that can be especially prone to glare. Adjustable treatments like blinds are particularly useful in these rooms because they can be reangled through the day rather than left in one fixed position, and movable curtains can be drawn partway during the most intense hours without blocking daylight the rest of the day.
Comparing Window Treatment Options
| Treatment | Effect on daylight | Glare control | Renter-friendly |
|---|---|---|---|
| Sheer curtains | Diffuses and softens, lets most light through | Reduces direct glare, limited for intense low-angle sun | Yes, with a tension rod |
| Horizontal/vertical blinds | Adjustable, can redirect light | Good, especially when angled away from eye level | Yes, many tension-mounted or cordless options exist |
| Heavy curtains/blackout panels | Blocks most or all daylight when closed | Very high when fully closed | Yes, with a tension rod |
| Layered sheer plus blind or curtain | Flexible, adjustable through the day | Best overall control across conditions | Yes, fully removable setups available |
Try this in your room
At a time of day when you normally use a desk, television, or reading chair, sit in your usual spot and notice where the brightest patch of light in the room falls. If it lands directly on a screen or in your direct line of sight, try temporarily angling a blind slat, pulling a sheer curtain partway across, or shifting your chair slightly to the side of the window rather than facing it head-on, and notice whether the glare or contrast improves.
Common mistakes
Blocking daylight entirely to avoid glare
Heavy blackout treatments solve glare but sacrifice the comfort and potential energy benefit of daylight. Diffusing light with sheers or angled blinds is usually a better first step than fully closing it out.
Facing a desk or screen directly toward a window
This creates strong contrast and reflections. Positioning the window to the side of a desk or screen is generally more comfortable.
Using the same window treatment setting all day
Daylight intensity changes significantly from morning to afternoon. Adjustable blinds or partially drawn curtains can be reangled as the sun moves.
Forgetting supplemental lighting during the day
A dim room next to a bright window creates contrast glare. A small amount of ambient or task lighting during the day can even out that contrast.
Renter-friendly alternatives
Renters can manage daylight and glare fully with non-permanent solutions. Tension rods allow curtains, including sheers and blackout panels, to be hung without drilling into window frames or walls. Cordless, pressure-fit blinds are widely available and install without screws, and portable floor or table lamps can supply the supplemental daytime lighting mentioned above without any wiring changes. All of these options come down easily at the end of a lease and leave no permanent marks.
Frequently asked questions
Does daylighting actually reduce energy use?
Using daylight instead of electric lighting during the day can help reduce reliance on artificial light, which may lower energy use over time, but actual results depend on window size, orientation, climate, and personal habits, so there is no universal figure.
What is the difference between direct glare and contrast glare?
Direct glare comes from unshaded sunlight falling straight onto a workspace or into your line of sight, while contrast glare comes from a bright window next to a comparatively dim room, forcing the eyes to readjust constantly.
Are blinds or curtains better for controlling glare?
Both can work well; blinds offer more fine adjustment throughout the day, while curtains, especially a sheer layer, diffuse light more softly. Many rooms benefit from combining both.
Why does my computer screen look washed out near a window?
A bright window behind or beside a screen can overpower the screen's own brightness and create reflections. Repositioning the screen to the side of the window, rather than facing it or backed by it, generally helps.
Do I need to block all daylight in a home office to avoid glare?
Usually not. Diffusing light with sheers or angled blinds and positioning the desk to the side of the window is typically more comfortable than blocking daylight entirely.