The Best Blackout Curtains

Why You Should Trust Us

This article was written by Jessica Hughes, Product Testing Lead at SleepScore Daily. We buy every product we test at retail, track results with wrist actigraphy and nightly sleep diaries across a panel of testers, and never accept payment for placement or a favorable review. See our testing standards for the full picture.

Light intrusion is the most common correctable cause of early-morning awakening. A 2019 study in the Journal of Pineal Research demonstrated that even 5 lux of ambient light during the second half of the night — roughly equivalent to a streetlight filtered through standard curtains — reduced REM sleep duration by 12% and advanced cortisol awakening response by 23 minutes. For anyone who wakes before their alarm and cannot fall back asleep, bedroom light exposure is the first variable to investigate.

We tested 14 blackout curtain products over ten weeks in four panelists' bedrooms. Each bedroom presented a different light challenge: east-facing window with direct sunrise, west-facing window with evening sun, street-level window with streetlight exposure, and a second-floor window with mixed ambient light. We measured light leakage using a calibrated lux meter at five positions across the bed surface during peak external light conditions (sunrise, streetlight) with each curtain installed.

We also measured each curtain's thermal insulation (temperature differential between window surface and room ambient), noise attenuation (dBA reduction of 75 dBA pink noise played at 1 meter outside the window), and durability through 10 wash cycles. Sleep data came from Oura Ring Gen 3, with particular attention to early-morning REM duration — the sleep stage most vulnerable to light disruption.

Nicetown Blackout Curtains earned our highest sleep score at 9.4 out of 10. Their triple-weave polyester fabric blocked 99.2% of incoming light in our measurements, reducing bed-surface lux from an average of 18 lux (with standard curtains) to 0.14 lux — below the 0.5 lux threshold that the American Academy of Sleep Medicine recommends for optimal sleeping environments. And at under $30 per panel, they are the most cost-effective sleep intervention in any category we test.

Top Sleep Score

The Best Blackout Curtains

Nicetown Blackout Curtains by Nicetown

Triple-weave polyester blocks 99% of light and reduces outside noise. Under $30 per panel with 30+ color options.

How We Tested

Our five scoring criteria:

Light blocking (30%) — the primary job. We measured lux at five bed positions (head left, head right, center, foot left, foot right) during sunrise, midday, and with a calibrated 250-lux light source placed outside the window to simulate streetlight. The Nicetown achieved 99.2% blocking at center-bed and 97.8% at the most vulnerable position (the edge closest to the curtain gap). For comparison, standard lined curtains typically achieve 60–75% blocking, and "room darkening" curtains (a meaningless marketing term with no standard) ranged from 80% to 94% in our test. True blackout requires ≥99% blocking to achieve the sub-0.5 lux standard recommended for sleep environments.

Thermal insulation (20%) — blackout curtains create an air pocket between the window and the room that acts as insulation. We measured the temperature differential between the window surface and room ambient with each curtain installed. The Nicetown's triple-weave construction maintained a 7.2°F differential during summer (keeping heat out) and 5.8°F during simulated winter conditions (keeping heat in). This translates to real energy savings — the DOE estimates that window treatments can reduce heating costs by 10% and cooling costs by 33% when properly installed. More directly relevant to sleep: the insulation helps maintain the 65°F bedroom temperature target by buffering against window-radiated heat or cold.

Durability (15%) — we washed each curtain 10 times on cold/tumble dry low and measured changes in light blocking, fabric weight, color fastness, and grommet integrity. The Nicetown lost 0.3% blocking effectiveness after 10 washes — negligible. Two competitors lost 3–5%, and one developed pinholes visible as light dots on the bedroom wall. Grommet integrity was tested by applying 15 lbs of pull force (simulating aggressive opening/closing); all Nicetown grommets held without deformation.

Aesthetics (15%) — a curtain is a major visual element in the bedroom. We scored each product on drape quality, color accuracy (does the delivered color match the listing photo?), and overall contribution to bedroom calm. The Nicetown scored 9.8 — the fabric drapes well, the color selection (30+ options) allows matching any decor, and the grommet-top style creates even, regular pleats. Two competitors with rod-pocket tops created bunched, uneven draping that our panelists rated as visually stressful — counterproductive in a sleep environment.

Value (20%) — at under $30 per panel, the Nicetown is the price leader among true blackout curtains. Several competitors cost $60–100+ per panel and blocked less light. We calculated value as light-blocking-percentage per dollar — the Nicetown led by a wide margin.

Why Light Control Is the Highest-ROI Sleep Investment

Of all the environmental variables that affect sleep — temperature, noise, air quality, bedding — light is the one that the research most consistently links to measurable sleep architecture changes. A 2023 meta-analysis in Sleep Medicine Reviews covering 38 studies found that sleeping in environments above 3 lux was associated with a 15% reduction in slow-wave sleep, a 10% increase in cortisol awakening response, and a 22-minute advancement of the cortisol morning peak.

Dr. Phyllis Zee, chief of sleep medicine at Northwestern, has called light exposure during sleep "the most underrecognized cardiometabolic risk factor." Her 2022 study in PNAS demonstrated that even moderate light exposure (100 lux — equivalent to a dim room with thin curtains) during sleep increased overnight heart rate, reduced heart rate variability, and elevated morning insulin resistance compared to sleeping in darkness below 3 lux.

Blackout curtains eliminate this entire risk category. The Nicetown achieves 0.14 lux at bed level — well below the 0.5 lux clinical threshold — for under $60 per window. There is no other sleep intervention that produces this magnitude of physiological benefit at this price point.

Our panelists' sleep data confirmed the research. During the Nicetown testing block, average REM duration increased by 16 minutes per night compared to standard-curtain baseline. Early-morning awakenings (defined as waking more than 30 minutes before alarm) decreased by 62%. Sleep efficiency (percentage of time in bed actually sleeping) improved from 86.3% to 91.7%.

Alternatives for Different Sleepers

Best premium option: West Elm Belgian Flax Linen Blackout Curtains. If you want blackout performance in a natural-fiber, high-end aesthetic, West Elm's linen blackouts deliver. They achieve 98.4% light blocking — slightly less than the Nicetown but still below the 0.5 lux threshold in most bedrooms. The linen texture and weight create a beautiful drape that several panelists preferred aesthetically. They scored 8.8 overall; the penalty is price ($120+ per panel) and the fact that linen requires more careful laundering than polyester.

Best for renters: Redi Shade Original Blackout Pleated Paper Shade. If you cannot install a curtain rod (or need a temporary solution), these adhesive-mounted paper shades block 99% of light at under $10 per window. They scored 7.2 overall — the light blocking is genuinely excellent, but the aesthetics are strictly functional, the paper tears easily, and they have zero thermal insulation. For a temporary apartment, a nursery blackout solution, or travel use, they work remarkably well.

Best for total darkness: blackout curtains + Velcro light seal. No curtain eliminates 100% of light because gaps exist at the edges, top, and bottom. If you need clinical-grade darkness (shift workers, migraine sufferers, extreme light sensitivity), add a Velcro light seal strip around the window frame. This creates a complete perimeter seal that eliminates edge leakage. Our shift-worker panelist used this combination and achieved 0.01 lux — indistinguishable from full darkness. The Velcro strips are removable and cost under $15.

Installation Tips for Maximum Blackout

Mount the rod 4–6 inches above the window frame and 3–4 inches beyond each side. This eliminates the top and side light gaps that undermine even the best blackout fabric. The curtain should pool slightly on the floor or reach exactly to the floor — any gap between the curtain bottom and floor allows light to enter from below.

Use a wrap-around rod if your window is adjacent to a wall. A standard rod leaves a light gap between the curtain end and the wall. Wrap-around rods curve the curtain against the wall, sealing the edge.

Layer if necessary. For south-facing windows with intense midday sun, a sheer curtain behind the blackout provides UV protection during the day (protecting furniture from fading) while the blackout handles nighttime darkness. This layered approach also provides a natural daytime-to-nighttime transition — close the sheers during the day, add the blackout at bedtime.

Test your installation at peak light. After hanging, stand in the bedroom at the time of maximum external light (usually sunrise for east-facing, sunset for west-facing, midday for south-facing). Look for light gaps at the top, sides, bottom, and center gap (where the two panels meet). A $3 binder clip can close the center gap; installation adjustments handle the rest.

Installation Tips for Maximum Light Blocking

Even the best blackout curtains will underperform if they are not installed correctly. Light leakage around the edges — what sleep researchers call "light intrusion" — is the most common complaint we hear, and it is almost always an installation problem rather than a product deficiency. The curtain rod should extend at least 4 inches beyond each side of the window frame so the fabric overlaps the wall, and the rod should be mounted 4 to 6 inches above the top of the frame to prevent light from spilling over the top edge. Our testing found that proper overlap installation reduced measurable light leakage by 85% compared to curtains hung flush with the window frame.

For sleepers who need near-total darkness — shift workers, migraine sufferers, or anyone whose circadian rhythm is particularly light-sensitive — consider adding a wrap-around curtain rod or ceiling-mounted track system. These designs curve the curtain toward the wall at the sides, eliminating the light gaps that straight rods leave open. Velcro strips along the wall edges provide an additional seal for extreme light sensitivity. One of our panelists, a night-shift nurse, reported that adding edge-sealing Velcro strips to her existing blackout curtains reduced her sleep onset time by an average of 14 minutes, because the residual light that had been reaching her pillow was enough to suppress melatonin production during her daytime sleep window.

Installation Techniques That Eliminate Light Leakage

Even the highest-quality blackout curtains fail to achieve true darkness if light leaks around the edges — a problem that standard curtain rod installations almost guarantee. The most common light leak occurs at the top, where the gap between the curtain rod and the wall allows light to spill over the curtain header. Mounting the rod six to eight inches above the window frame and using curtain panels that extend at least four inches beyond each side of the frame eliminates the majority of edge leakage. Wraparound curtain rods, which curve back toward the wall at each end, block side light more effectively than straight rods.

For sleepers who require near-total darkness — shift workers, migraine sufferers, or anyone whose bedroom faces east — adding magnetic strips or Velcro tape along the curtain edges creates a seal against the wall that blocks residual light leakage. This approach sounds extreme, but polysomnography research from the National Sleep Foundation has demonstrated that even low-level ambient light of 5 to 10 lux during sleep suppresses melatonin production by 50 percent, which is enough to measurably reduce slow-wave sleep duration. The difference between a good blackout installation and a great one is the difference between a dim bedroom and a truly dark one, and the sleep quality data favors the latter.

Our Sleep Score Verdict

Nicetown Blackout Curtains earn our top sleep score of 9.4 against a category average of 7.7. At under $30 per panel, they are the highest-value sleep product we have ever tested in any category.

The sleep science is unambiguous: sleeping in darkness below 0.5 lux produces measurably better REM sleep, lower cortisol awakening response, and higher sleep efficiency. Blackout curtains achieve this for every night, with zero ongoing cost and zero maintenance. Our panelists' data confirmed it — 16 more minutes of REM, 62% fewer early awakenings, 5.4 percentage points of sleep efficiency gained.

If you have not yet addressed light in your bedroom, blackout curtains should be your next purchase regardless of what else is in your sleep stack. The Nicetown delivers 99.2% blocking, thermal insulation, noise reduction, and 30+ color options at a price that makes this a same-day decision. It is the easiest recommendation we make.