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Get the Hotel Smart Window, Made for Your Window

From $249or 4 payments of $62.25

Check my price
  • Ships in 2–3 weeksMade to size
  • 2-year warrantyOn every kit
  • Full refundBefore we cut
  • Cut to fit your window
  • Frosted at a click, clear at a click
  • No tools, no electrician
  • Free remake if it doesn't fit

Already in hotel bathrooms

  • Andaz San DiegoSan Diego
  • Eccleston Square HotelLondon
  • Novotel London HeathrowLondon · 136 rooms
  • NUMA HotelTel Aviv · 55 rooms

As covered byNBC NewsTime Out LondonInteresting Engineering

1Choose your colour White frosted

2Do you have your window size?

Measure the glass only, inside the frame.

Measure 3 times, enter the smallest. No tape? A rough size is fine: we email to confirm before we cut.

Your price—Updates as you type
  • Ships in 2–3 weeks.
  • Full refund before we cut. Returns
  • Pay later: Shop Pay, Klarna or Afterpay
  • Fit guaranteedRemade free if it doesn't fit
  • 2-year warrantyTwo full years on every kit
  • Up to 99% UV blockedFloors and furniture fade less
  • Pay in 4, 0% interestShop Pay, Klarna or Afterpay
  • No tools, no electricianPeel, stick, plug in: about 30 minutes

Fit guaranteed · 2-year warranty · Up to 99% UV blocked · Pay in 4, 0% interest · No tools, no electrician

Quick answers

Will it fit?

It's cut to your size, or remade free.

Is it hard to install?

No tools or electrician; it's pre-wired. Peel, stick, plug in, about 30 minutes.

What if the power goes out?

It goes frosted, so you stay private.

Does it work at night?

Yes, unlike one-way film.

How to measure

Tape measure: the most accurate way.

Measuring the glass width inside the frame with a tape measure
  • Glass only, inside the frame.
  • Three widths and three heights; enter the smallest of each.
  • Don't subtract anything.
Measure with your phone camera

Use a sheet of paper as your ruler.

  1. A sheet of printer paper taped flat on the window glassTape one sheet of printer paper (A4 or US Letter) flat on the glass, near a corner. Not a book, card or box: the paper's exact size is the ruler.
  2. A phone framing the whole window, paper includedStand straight in front of the window and take a photo of the whole pane with the normal 1× camera (not 0.5×).
  3. Blue dots on the paper corners, amber dots on the glass cornersCheck the dots: they find the paper's corners, then the glass corners, by themselves. Drag any that are off. We work out the size.

The photo stays on your phone until you order. It is then attached to your order as your window photo.

See smart film switch

Smart film switching, as shown by Interesting Engineering: 795,950 views.
A bedroom window at night, lamp on, the glass bare: the garden and a neighbour's lit window outside.
The same window at night after one click: frosted, the lamp still on.
One click: frosted
The same window in the morning after one click: clear, the garden in sun.
One click: clear
Get my price

One window. One click.

Lamps on, bare glass?

Anyone outside can see straight in.

Scroll to fix it

Made to measure.

Cut to your glass, edge to edge. It sticks on in about 30 minutes.

One click: frosted.

Lamps on, still private. Outside sees a soft glow, not you. By day, the light still comes in.

One click: clear.

Your morning view, back. No blinds to pull.

From $249, cut to your size.

If it doesn't fit, we remake it for free.

Get my priceWhich room is it for?

Which room is it for?

Tap a room. See it switch, with the price.

Bathroom Small · $249

Have your size? Type it in for the exact price

See what the street sees at night

Private after dark. The light stays.

Lamps on, clear glass: the street sees in. Frosted, it only sees a glow.

  • No detail visible from outside.
  • No more blinds down at sunset.

Try it at night

A lit ground-floor room seen from the street at dusk, film clearproblem solved: the same room seen from the street with the film frosted, a soft glow

Lamps on, film clear: the street can see in.

Why not just blinds or frosted film?

Light or privacy. Why not both?

Every old fix picks one. Smart film gives you both.

Blinds: private, and dark at noon.

Blinds block the light

Close for privacy. The room goes dark.

Frosted film: private, never clear.

Frosted film no off switch

Private forever. The view is gone.

Time-lapse: one-way film is a mirror by day, see-through at night.

One-way film fails at night

Lamps on? People see straight in.

Two glaziers carry a big glass pane into a house
Installed smart glass: new pane, two fitters.

Smart glass $560–1,200 installed

Switches, but needs a contractor and new glass.

A weekend workbench with a roll of film, a utility knife, a tape measure, stripped wires and a soldering iron
DIY film: you cut it, then you wire it.

DIY smart film costs a weekend

Cut it a few mm off and it won't sit. Then you wire it.

The kit for one window, the film cut to size with its wired edge, the adapter and the remote
Cut and wired for your glass.

Our kit both, at one click

Cut and wired for your glass. Light still gets in. From $249.

Get my price

So how does one film do both?

Power off: frosted. Power on: clear.

Liquid crystals inside the film. Off: they scatter the light. On: it passes through.

Try it: tap a button

Power on: clear. You see straight out.

Inside the film: power off, the crystals scatter the light. Power on, they line up and the glass clears.
  • Power cut? You stay private.
  • Silent. Switches instantly.
  • Low-voltage plug-in. No batteries.
A hand plugs the adapter into a normal wall socket, the remote in the other hand, the frosted window above
Plugs into a normal socket. One thin cable to the film.
The thin white cable from the film strip tucked into the white cable cover along the window frame
One thin cable, tidied into the white cover.
Power cut? It goes frosted. You stay private.

What does clear cost to run?

About 1.1 kWh a monthfor this window

Based on 6 W per m², the top of the 4–6 W range. The film draws power only when clear.

Hotels have used this for years. See who

The hotel trick. Yours for $249.

Hotels frost the bathroom glass at one switch. Same effect, on your window.

A hotel suite with a glass bathroom wall, clear, then frosted
The hotel-bathroom moment, on a button.
  • A hotel bathroom with a frosted glass shower
    Andaz San DiegoSan Diego

    Shower glass frosts at one button.

    Reported by NBC News
  • A marble hotel bathroom behind a frosted glass wall
    Eccleston Square HotelLondon

    A switch frosts the marble bathroom walls.

    Reported by Time Out London
  • A hotel room with a frosted glass bathroom partition
    Novotel London HeathrowLondon · 136 rooms

    Switchable bathroom glass.

    Reported by Intelligent Glass
  • A boutique hotel room with a frosted glass bathroom partition
    NUMA HotelTel Aviv · 55 rooms

    Smart glass bathrooms.

    Reported by Gauzy

21,244,982views on YouTube. Five demos, same trick.

What people ask on Reddit, and our answers

Night

“I have led lights on the back of the monitors, and the lights can be seen from the outside at night.”

Reddit · r/smarthome

Our answerFrosted glass still lets light through. Ours glows from either side, day or night, and detail stays hidden.

Power

“Does that mean you have to constantly power them for them to be transparent?”

Reddit · r/homeautomation

Our answerYes: clear uses 4–6 W per m², about a phone charger. Frosted needs no power to the film, which is why a power cut leaves you private.

Fit

“One piece bowed out in the middle. When there's only a couple of mm tolerance, it makes a difference.”

Reddit · r/homeassistant

Our answerYou measure with our guide and we cut it for you. If it still doesn't fit, we remake it free.

Clarity

“How is the cloudiness of the film? How much did it cost?”

Reddit · r/homeautomation

Our answerUnder 3% haze when clear: you see straight through. Your full kit price shows before you order: $249 up to 0.75 m² (8 sq ft).

Wires

“Thanks! Yeah I think it's slightly beyond me to hide the wires well!”

Reddit · r/homeassistant

Our answerOurs arrives pre-wired. Tell us where your nearest socket is and the cable comes out on that edge. A white cable cover is in the box.

Cutting

“I’m struggling to cut the film square on the longer side with a Stanley knife”

Reddit · r/DIYHome

Our answerYou never cut ours. It arrives cut to your glass, with the edge already wired and sealed.

Lifespan

“How is this holding up? I've heard longevity for these can be iffy”

Reddit · r/smarthome

Our answerEvery kit carries a 2-year warranty. Clean it with a soft damp cloth and an ammonia-free cleaner.

Renting

“I’ve seen films that supposedly just peel off, but have also seen people saying they leave glue behind.”

Reddit · r/HomeImprovement

Our answerOurs peels off. Renting? It goes up without drilling, screws or new glass.

One window, 8 sq ft. Two ways to get it.

  • Two fitters carrying a new glass paneInstalled smart glassNew glass + two fitters$560–1,200
  • The film, cut to size, with its wired edgeThis kitCut to your glass. You stick it on.$249

You keep $311–951. Same switch. No contractor.

Pro quotes, Oct 2026: film $50–100/sq ft, fitting $20–50/sq ft.

Bigger window? Slide to your size.

This kit$249

Installed quoteabout $560–1,200

Typical pro quotes, Oct 2026: $50–100 per sq ft for the film, plus $20–50 per sq ft to fit it.

From $249 · or 4 payments of $62.25Get my price

Under 3% haze. See how clear it looks

Clear when on. Bright when off.

Under 3% haze when clear. Daylight stays in when frosted.

A living room by day, the big window clear, then frosted with the daylight still in
Tap the picture to switch it.
The film close up in clear mode
Clear: you see out, with a slight haze.
The film close up in frosted mode
Frosted: light in, detail hidden.

It looks right. Will it fit your window?

You measure. We cut it to fit.

Two numbers. The factory does the cutting and the wiring.

Your two numbers, cut to size, wired and filmed switching before it ships.
  1. 1YouOrderEnter your size, or measure later.
  2. 2UsWe make itCut, wired, shipped in 2–3 weeks.
  3. 3YouYou installClean, stick, plug in. About 30 minutes.

Three ways to measure

  • Glass only, inside the frame.
  • Three widths and three heights; enter the smallest of each.
  • Don't subtract anything.

Will it work on my window? 3 quick questions, plus 1 optional

  1. Is the glass flat and smooth?

  2. Is it a rectangle?

  3. Is there a power socket near the window?

  4. Is it a shower door? optional

We film your panel switching before it ships. No perfect switch, no ship.

Once it is cut, how do you put it on?

Clean. Stick. Plug in. About 30 minutes.

Pre-wired. No tools. Like a big screen protector.

Clean and dry. The lint roller gets the last specks.
  • Bubbles? Squeegee them out.
  • The cable exits your nearest edge.
  • Step-by-step video in the box.
Everything for one window, in one box.
See everything in the box

What comes in the box

Everything in one box. From $249.

Cut to your size. Wired at the factory. Ships in 2–3 weeks.

The film panel cut to size, frosted, with its wired edge
Cut to your glass, wired at the factory.
The two-button remote in a hand
Two buttons. That is the whole control.
The same panel, clear
Clear when powered.

What's in the box

packshot: everything for one window laid out: the frosted film with its wired edge and cable, the plug-in adapter, the two-button remote, squeegee, two wipes, cloth, lint roller, white cable cover, practice sheet and quick guide
Tap a line to find it in the box.

Our promises

  • Fit guarantee

    If it doesn't fit, we remake it for free.

  • Free install help

    A quick guide with a video link, in the box.

  • Pay later

    Split it into 4 payments.

  • No risk before we cut

    Full refund any time before cutting starts.

Questions before you order? Email info@lumera-us.com.

From $249 · or 4 payments of $62.25

Get my price

How it stacks up against every other option

Six privacy options, side by side.

Only one switches, fits your glass, and ships from $249.

Lumera kitInstalled smart glassCut-it-yourself filmBlinds or curtainsFrosted filmOne-way film
Private at nightOne-way film fails here.
Daylight in when privateBlinds block it.
Switches at one clickFrosted film never clears.
No contractorYou fit it in 30 minutes.
Cut and wired for youDIY film goes wrong here.Partly
Keeps your glassNo new pane.
Price, one windowfrom $249$560–1,200about $14–75 per sq ft, power often extravariesvariesvaries

Want the numbers? Every figure, here

The numbers behind the switch.

Every figure. No fluff.

The film's layers lifted apart: liner, optical adhesive, PET with its conductive coating and the factory-wired copper strip, the liquid-crystal layer, the second conductive PET, the UV-blocking face
What is inside: two conductive layers, the liquid crystals between them, and the edge we wire at the factory.
Product
Self-adhesive smart film (PDLC), cut to size, pre-wired
Price
$249 up to 0.75 m² (8 sq ft), +$25 per extra 0.1 m²
Colours
White frosted, grey
Clear mode
Haze <3%
Frosted mode
Haze >95%, private from both sides
UV / IR
Up to 99% UV, up to 85% IR blocked
Power
4–6 W per m² when clear; zero when frosted; plug-in power supply
Largest film width
1,800 mm (71 in); custom length
Cable
Pre-wired at the factory; exits on the edge nearest your socket, tidied in a white cable cover
Control
Two-button remote included
Warranty
2 years
Delivery
Made to order, ships in 2–3 weeks
Glass
Flat, smooth glass; applied on the inside. Rectangles only

Still deciding? 35 answers

35 questions people ask before buying.

Will it fit?

Cut to your measurements, or remade free.

What if I measure wrong?

Not sure of your size? Order with an estimate. We email you to confirm the exact size before we cut. If it still doesn't fit, we remake it free.

Big windows?

Up to 1,800 mm (71 in) wide in one piece, any length. Larger glass uses panels side by side with a thin seam.

Odd shapes, handles, curved glass?

Rectangles only for now. Not for curved or textured glass.

Can I trim it myself?

No. Cutting damages the film, which is why we cut it for you.

Is it hard?

Pre-wired, no tools. Like putting on a big screen protector.

How long does it take?

About 30 minutes.

Bubbles?

Press them out with the included squeegee.

Need help?

The quick guide in the box has a video link.

Shower doors?

Put it on the dry side and keep it away from direct spray.

Inside or outside the window?

Inside only.

Electricity cost?

Zero when frosted. About phone-charger level when clear: 4–6 W per m².

Power cut?

It goes frosted, so you stay private.

Do I need a socket?

Yes, a normal wall socket. Tell us the nearest edge and the cable comes out there. A white cable cover is included.

Battery-powered?

No, plug-in only.

Is it safe?

Yes. It runs from a low-voltage plug-in power supply. No mains wiring at the window, no electrician.

Is it noisy or slow?

Silent, and it switches instantly.

Remote range?

It works from anywhere in the room. Point, press, done.

Several windows?

Each kit has its own remote.

Alexa or Google?

Coming soon.

Colours?

White frosted and grey.

How clear is it?

Very clear: under 3% haze when on. Over 95% haze when frosted, so nobody sees in.

Does it block light?

No. Frosted mode lets light through, like frosted glass.

Private from outside?

Yes, it's frosted from both sides.

Works at night?

Yes.

UV and heat?

It blocks up to 99% of UV and up to 85% of infrared, so floors and furniture fade less.

Bonus: projector screen

Bonus: frosted mode doubles as a projector screen.

How do I clean it?

Soft damp cloth and ammonia-free cleaner. No scrubbers or blades.

How long does it last?

2-year warranty; years of normal use.

Kids and pets?

The film is safe to touch; keep the cable tucked in its cover.

Can I remove it?

Yes. It peels off.

Can I take it to a new home?

It's cut for this window, so not reusable elsewhere.

Delivery?

2–3 weeks, because it's made to order.

Returns?

Custom cut, so the fit guarantee and defect warranty apply; no change-of-mind returns.

Can I pay later?

Yes, at checkout.

Which countries?

The US is our launch market. We check delivery to your address before you pay.

Your window. One click from private.

Two numbers. Cut, wired, shipped in 2–3 weeks. Free remake if it doesn't fit.

  • Cut to fit
  • Free remake
  • Pay in 4
  • 2-year warranty

Made-to-Measure Kit · From $249 or 4 payments of $62.25

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