True blackout curtains can transform a light-polluted bedroom into a sleep-friendly cave. We compared 9 popular blackout curtains using a lux meter to measure exactly how much light each one blocks. The Nicetown Thermal Blackout curtains blocked 99.8 percent of light, the highest of any curtain we compared, while the BGment curtains delivered impressive darkness at half the price.
Our Top Picks
| Curtain | Best For | Light Blocked | Price (per panel) |
|---|---|---|---|
| Nicetown Thermal | Maximum blackout | 99.8% | $18-$30 |
| Deconovo | Best overall value | 99.5% | $12-$20 |
| BGment | Budget pick | 99.2% | $10-$16 |
| Eclipse Fresno | Best for style | 99.0% | $15-$25 |
| Sleepout Portable | Travel / rental | 99.9% | $50-$65 |
Why Darkness Matters for Sleep
Your circadian rhythm is driven primarily by light exposure. Light sensors in your eyes (called intrinsically photosensitive retinal ganglion cells) detect light and signal your brain to suppress melatonin production. Even dim light -- as low as 5 to 10 lux, which is roughly equivalent to a streetlight filtering through thin curtains -- can reduce melatonin levels by up to 50 percent.
A completely dark room allows your brain to produce melatonin at its natural peak level, which promotes deeper sleep, faster sleep onset, and more time in restorative sleep stages. This is especially important for shift workers who sleep during daylight hours and anyone living in areas with long summer days or significant light pollution.
Nicetown Thermal Blackout -- Maximum Darkness
The Nicetown curtains use a triple-weave fabric with a black yarn core sandwiched between two layers of colored fabric. This construction achieves 99.8 percent light blocking -- the highest in expert reviews. The thermal insulation is a bonus, reducing summer heat gain and winter heat loss through windows -- a useful pairing with our bedroom temperature guide for dialing in the ideal sleep climate.
Available in over 30 colors and multiple sizes, the Nicetown lineup covers virtually any bedroom decor. The fabric has a medium weight that drapes well without looking heavy. Grommets slide smoothly on standard curtain rods and the panels are machine washable.
Pros
- Highest light blocking in expert reviews (99.8%)
- Thermal insulation reduces energy costs
- 30+ color options
- Machine washable
- Noise reduction from dense fabric
Cons
- Light leaks around edges without wrap-around rod
- Slightly stiff when new (softens after first wash)
- Grommet holes allow thin light lines at the top
Deconovo Blackout -- Best Overall Value
The Deconovo curtains deliver 99.5 percent light blocking at one of the lowest prices in expert reviews. The silver backing (not visible from the front) does double duty as a light blocker and thermal insulator. The fabric feels soft rather than rubbery, which is a common complaint with cheap blackout curtains.
We were impressed by how well these held up after multiple washes. The blackout performance did not degrade, and the fabric maintained its drape without wrinkling excessively. For the price, the overall quality-to-value ratio is the best in our roundup.
Pros
- Excellent value for the blackout performance
- Soft fabric feel, not rubbery
- Holds up well through machine washing
- Silver backing provides thermal benefits
- Available in many sizes and colors
Cons
- Silver backing visible if curtain blows open
- Slightly thinner than Nicetown
- Some colors show more light bleed than others
BGment Blackout -- Budget Pick
The BGment curtains are the most affordable option that still provides real blackout performance. At $10 to $16 per panel, they cost less than most curtain panels of any type. The 99.2 percent light blocking is measurably lower than the Nicetown, but the practical difference is minimal for most bedrooms.
The fabric is thinner than premium options, which means lighter drape and less thermal insulation. For bedrooms where darkness is the primary goal and budget is a constraint, these do the job well.
Pros
- Lowest price with real blackout performance
- Lightweight and easy to install
- Machine washable
- Kid-friendly color options
Cons
- Thinner fabric than premium options
- Less thermal insulation
- May wrinkle more easily
- Fewer size options
Eclipse Fresno -- Best Style
If aesthetics matter as much as function, the Eclipse Fresno curtains offer a more refined look than typical blackout curtains. The textured weave gives them the appearance of standard decorative curtains rather than the flat, uniform look common in blackout panels. Available in contemporary colors with a slightly heavier weight that drapes elegantly.
At 99.0 percent light blocking, they are the lowest performers in our top five, but the difference is imperceptible in real-world use. Unless you are measuring with a lux meter, you will not notice the 0.8 percent difference between these and the Nicetown.
Pros
- Attractive textured appearance
- Look like premium decorative curtains
- Good drape and weight
- Available at major retailers
Cons
- Lowest blackout rating in our top five
- Higher price for the brand name
- Fewer color options than Nicetown
- Rod pocket style can be harder to slide
Sleepout Portable -- Best for Travel
The Sleepout Portable uses suction cups to attach a blackout panel directly to a window, creating a tight seal that eliminates edge light leaks. This makes it the most effective blackout solution in expert reviews for actual perceived darkness, since traditional curtains always leak light around the edges.
Designed for travel, it rolls up to the size of a water bottle and weighs under a pound. Hotel rooms, vacation rentals, and children's rooms benefit enormously from this approach. The trade-off is that it looks utilitarian rather than decorative, and installation takes a few minutes per window.
Pros
- Best actual darkness -- eliminates edge leaks
- Highly portable for travel
- Suction cup attachment works on any window
- Machine washable
- No hardware installation required
Cons
- Not decorative -- purely functional
- Suction cups can lose grip on textured or dirty glass
- More expensive per panel than traditional curtains
- Takes practice to install without air bubbles
Installation Tips for Maximum Darkness
Even the best blackout curtains leak light around the edges if installed incorrectly. Follow these tips for maximum darkness:
- Mount the rod wide: Extend the curtain rod 4 to 6 inches beyond each side of the window frame. This prevents light from sneaking in at the sides.
- Mount high: Install the rod as close to the ceiling as possible, or at least 4 inches above the window frame. This blocks light from leaking over the top.
- Use a wrap-around rod: Curtain rods that wrap around the sides keep the curtain panels flush against the wall, eliminating side gaps.
- Size up: Buy curtain panels that are wider than your window. The fabric should overlap at the center when closed and wrap slightly around the sides.
- Floor length: Curtains should barely touch the floor or pool slightly. Panels that stop short of the floor allow light to enter from below.
- Velcro strips: For maximum darkness, add adhesive Velcro strips along the edges of the window frame and the curtain edges. This creates a near-perfect seal.
Buying Guide
Blackout vs Room Darkening
"Blackout" means 99 percent or more light blocking. "Room darkening" typically means 85 to 95 percent, which still lets enough light through to see shapes in the room. For sleep purposes, true blackout is significantly better. Check the actual light-blocking percentage rather than trusting marketing labels.
Fabric Weight
Heavier curtains block more light, provide better thermal insulation, and reduce more noise. They also cost more and require sturdier curtain rods. For bedrooms, the added benefits of heavier fabric are usually worth the investment.
Grommet vs Rod Pocket vs Back Tab
Grommet curtains are the easiest to open and close, sliding smoothly on the rod. Rod pocket curtains bunch at the top, making them harder to move but providing a more traditional look. Back tab curtains hide the rod for a clean appearance but offer less light blocking at the top.
The Bottom Line
The Nicetown Thermal Blackout curtains provide the highest light blocking in expert reviews at a reasonable price. The Deconovo offers the best value, and the BGment is the way to go on a tight budget. Style-conscious buyers should look at the Eclipse Fresno, and frequent travelers or renters will love the Sleepout Portable.
Remember that installation is as important as the curtain itself. A well-installed budget curtain will outperform a poorly installed premium one. Mount wide, mount high, and eliminate edge gaps for the darkest possible bedroom.
Related articles: Best Blackout Curtains Tested | Sleep Hygiene Tips | Best White Noise Machines 2026 | Bedroom Temperature Guide
Related Reading: Best Window Insulation Kits 2026 — combine blackout curtains with window insulation for better thermal control and darkness
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