Color Changing and RGBW Ceilings

A ceiling, cove or wall that holds a real white all day and turns any color on cue. RGBW LED behind a translucent membrane, run as DMX or DALI scenes, built to any outline in our Dania Beach shop.

A color changing ceiling is a field of 24V RGBW LED mounted above a tensioned translucent membrane. The membrane is both the diffuser and the finished surface, so there is no lens, no trim ring, no grid and no fixture to look at, and that is what lets the plane read as one source instead of a row of bright lines. Light transmission through our diffused translucent membrane measured 42.0% at Poznan University of Technology using the method in CIE 130-1998. That figure is a transmission measurement, nothing more.

A color changing fixture lights a surface. This is the surface. Because the LED sits in the cavity and the membrane spans between aluminum profiles, the light source can be any outline we can bend, at any size the room allows, on a ceiling or on a wall, and it can be printed and backlit at the same time. RGBW rather than RGB is the part that matters day to day: the same ceiling that goes deep blue for an event still delivers a clean white on a Tuesday morning, from a dedicated white die instead of three colors mixed into a compromise.

42.0%
Diffused membrane light transmission (test report, method per CIE 130-1998)
24V
Low voltage everywhere above the membrane
6 in
Minimum cavity for a full RGBW field (shop standard)
Any outline
Frames bent on our own CNC in Dania Beach
Why it works

What a color changing ceiling gets right

RGBW gives you a white you can live with

RGB makes white by mixing three narrow colors. It lands near white, and that white is three narrow bands rather than a white source. We hold no CRI testing and no lumen maintenance testing of our own, so the only rendering numbers we will quote are the ones the strip manufacturer publishes for the part we specify. RGBW adds a fourth dedicated white die in the same package, at the CCT you choose. The ceiling is an ordinary white ceiling most of the year and a color ceiling when you ask. Pastels are the second reason. On RGB a soft blush means crushing three channels down to a few percent output where the stepping shows. On RGBW it means white at a comfortable drive level with a little red added, which stays smooth and stays put.

The whole plane is the source

No lens, no trim, no grid line, no visible fixture. A large membrane changes color as one object, and when the color is off there is nothing on the ceiling to look at. That is what gets this specified in lobbies where the designer does not want hardware overhead, and it is why the effect reads as architecture instead of as lighting equipment.

Any shape, ceiling or wall, printed or plain

We bend the profile ourselves, so the luminous outline is whatever the drawing says: an island, a curve, a closed ring, a logo shape, a full wall panel. The same system runs vertical. Print the membrane and it is a graphic by day and a color field at night. Nothing here is a tile, a module or a panel size we have to design around.

Applications

Where it goes

The rooms we install this in most. The rest of the range is on the lighting systems page.

Hotel Lobbies & Ballrooms

Where one room has to read warm and neutral at breakfast and hold a brand color for a corporate booking that night, off the same ceiling and the same keypad.

Bars, Lounges & Nightclubs

Bars, lounges, nightclubs and entertainment centers, where the ceiling is the effect and there is nothing overhead to look at when the house lights come up.

Retail Interiors & Showrooms

Retail interiors and showrooms, including car showrooms, where the color follows the season, the campaign or the brand book.

Corporate Lobbies & Studios

Corporate lobbies, brand walls and broadcast or podcast studios, where ceiling and wall are both the source and there are cameras in the room.

Fitness & Wellness

Cycling studios, spas and treatment rooms, programmed by class or by service so the room changes with what is happening in it.

High End Residential

Home theaters, pool and spa enclosures, feature ceilings and kids rooms, often alongside a star ceiling on its own channel.

Process

How it is built

We build from the structure down. Ten layers, in this order.

  1. Cavity and back plane. We start at the deck and work down to the finished ceiling plane, because the gap between the LED face and the back of the membrane is the single number that decides whether the field looks even. Anything left in that cavity shows. A duct drop, a sprinkler branch, a joist, a hanger wire, a junction box, all of it reads as a shadow through a backlit membrane. We survey it, coordinate it, and where the structure is dark or busy we install a white back plane so the cavity bounces light instead of eating it. The cavity gets flat white paint, not eggshell. Sheen up there comes back down as a ghost reflection.
  2. Perimeter and shape profile. Extruded 6063 aluminum, white powder coat or mill finish, mechanically fastened to structure or to blocking we set. Which profile depends on what the light is doing. A full luminous field, ceiling or wall, uses a perimeter frame and the membrane spans the whole opening. A floating halo at the edge of the room uses AP-301 wall perimeter, AP-302 ceiling top, or AP-302-W wall perimeter D at 2 in by 1 in, the same detail we use for cove and perimeter lighting. A recessed color line in a flat ceiling uses AP-305 mini, AP-306 midi or AP-307 maxi, as on our linear lighting. A luminous shape sitting inside the plane uses AP-212 LuxForm small or AP-213 LuxForm large. AP-213 comes in 13 ft 1-1/2 in (4000 mm) stock with 8 in and 4.5 in profile heights, bends into U, C and O forms, and sections combine for large architectural shapes. Floating panels and islands use AP-216. Most profiles ship in 6.5 ft stock lengths; AP-213 is the 4000 mm exception.
  3. Bending. Curves, radii and closed shapes get bent on our own CNC profile bender in Dania Beach before anything goes to site. This is why the outline is not limited to a rectangle. We bend to the arc on your drawing, dry fit the frame on the shop floor, then ship it as a numbered kit so the crew assembles it in the order it was built.
  4. LED mounting. RGBW strip goes onto aluminum mounting bar, and the bar is mechanically fastened. We do not hang a color field on strip adhesive. Cavities run hot, adhesive is the first thing to let go up there, and one sagging row in a backlit field is visible from the floor forever. Rows run parallel, spaced against the cavity depth using the numbers below, with the outermost row set at half the field spacing off the inside face of the frame so the edge does not go dark.
  5. LED. 24V constant voltage RGBW in a 4-in-1 package, so red, green, blue and white sit under one lens and start mixing at the source. Separate R, G and B strips do not blend at short distance and we do not put them behind a membrane. Where the white itself has to move across the day, we specify a tunable white run at 2700K to 6500K alongside the color field. The entire visible field comes off one production lot. Lot changes show up as a step in the white and are the most common reason a color ceiling looks wrong on day one. We order 10% attic stock from the same lot and label it with the job.
  6. Power and low voltage wiring. Everything from the driver to the LED is low voltage. Runs are fed at both ends past roughly 10 ft and re-injected about every 16 ft, because the blue and green dies carry a higher forward voltage than red. When voltage sags at the end of a long run, blue drops off first and the far end of the ceiling goes warm and yellow before anyone notices a brightness change. Homeruns land in a labelled rack, not a nest.
  7. Drivers, decoders and access. Drivers, power supplies, DMX decoders and DALI gear all live in an accessible location: a closet, above a cabinet, or behind an access hatch we coordinate on the drawings. This is a hard constraint, not a preference. Control gear has to be serviceable without a lift and without taking a ceiling down. We size the rack early, label every channel, and hand over the patch schedule at closeout.
  8. Burn in and channel test. Before the membrane goes on, we run red, then green, then blue, then white, each at full, across the whole field. A dead segment, a reversed feed or a mismatched reel is obvious under a single-channel wash and invisible under white. We leave it burning, then walk it again. Catching it with the membrane off costs an hour. Catching it after costs a day and a return trip.
  9. Membrane. Translucent PVC, about 8 mil nominal, welded to size in our shop with a harpoon edge, then heated, stretched and locked into the profile on site. Surface burning characteristics, ASTM E84, tested per finish on white specimens: gloss FSI 5 and SDI 300, matte FSI 10 and SDI 300, satin FSI 15 and SDI 250. The laboratory assigned no classification. Specimens were not mounted per ASTM E2573. This is membrane data only, not a plenum assembly, and the membrane is not permitted in return-air plenums on this data. Report available on request. We use the diffused translucent grade, which measured 42.0% light transmission at Poznan University of Technology by the CIE 130-1998 method. We do not use the transparent grade behind LED even though it passes more light at 70.5%, because it does not hide the diodes. Large fields are welded from roll widths, and in a backlit ceiling a weld line is faintly visible. We lay the welds out on the reflected ceiling plan with you first, so the line falls on a design line instead of across the middle of the lobby.
  10. Programming and handover. Scenes get built on site with the designer, in the finished room, at night if that is when the room actually gets used. We lock the scene list, engrave the keypad, and leave a channel map plus a written scene description with the closeout documents. The membrane can be released from the profile and re-tensioned, so the cavity stays serviceable. Membrane is warranted 10 years, LED and electrical 3 years.
Shop standards

Design guidance

These are shop standards, built from what we have installed and what has come back to bite us. They are not laboratory data and we will not present them as such. Treat them as the numbers we hold ourselves to on your job.

Cavity depth versus row spacing

The rule we build to is cavity depth at or above 1.5 times the spacing between LED rows for RGBW. Tunable white and single color fields can run at 1.0 times, because there is only one die to blend. RGBW needs the extra depth because four separate dies have to overlap before they reach the membrane. Rows at 4 in on center want a 6 in cavity. Rows at 6 in on center want 9 in. Rows at 8 in on center want 12 in. Six inches from LED face to the back of the membrane is our hard floor for a full RGBW field, and 8 to 10 in is where fields look their best. Under 6 in we either tighten the rows and add a second diffusion layer at mid cavity, which lets us build shallower, or we tell you to use RGBW in a cove or a linear line instead of a field. We would rather lose the field than hand over a striped ceiling.

LED density

Minimum 60 packages per meter, roughly 18 per foot, for a saturated color field. Deep blue and deep red are the two states that expose sparse strip as scalloping, because you are driving one die group while the others sit dark. If the design has a deep blue scene, spec for the blue, not for the white.

Pixel effects

Gradients, sweeps and chases need addressable pixel control, not one decoder per zone. For pixel work the rule tightens to cavity depth at or above 2 times pixel pitch, so a 2 in pixel pitch wants at least 4 in on that axis and we still hold the 6 in field minimum. Go shallower and a gradient reads as a row of dots crawling across the ceiling instead of a wash moving through it.

Perimeter and edges

The outermost LED row sits at half the field spacing from the inside face of the profile. Field rows at 6 in on center means the outer row lands 3 in off the frame. Skip this and you get a dark band around the perimeter that no amount of driver output will fix.

Run lengths, feeds and voltage

24V constant voltage. Feed both ends past roughly 10 ft and re-inject about every 16 ft. Keep every run inside one visible zone on the same driver and the same brand of decoder. Two brands of driver on one field will match at 100% and split visibly somewhere under 10%, because their dimming curves are not the same shape.

Dimming resolution

Specify 16-bit control for any scene that fades slowly. 8-bit DMX gives 256 steps per channel, and on a large even field a two minute sunset fade at 8-bit steps visibly. Nobody notices 8-bit on a snap change. Everybody notices it on a slow one.

PWM and cameras

If the room gets filmed, and in hospitality and retail it will, specify drivers with PWM at or above 3 kHz. Low frequency PWM is invisible to the eye and lands as banding on a phone camera in slow motion. Decide this before the order, not after the opening party.

What causes hot spots and stripes, in the order we see them

  1. Cavity too shallow for the row spacing.
  2. Something left in the cavity casting a shadow: duct, sprinkler drop, hanger, junction box.
  3. A dark or unpainted cavity that absorbs the bounce.
  4. Mixed LED lots inside one visible field.
  5. The outer row set too far off the perimeter.
  6. A localized dip that brings one strip closer to the membrane than the rest.

Five of those six are decided in coordination, months before we show up on site.

White channel selection

The white die CCT is fixed at order: 2700K, 3000K, 3500K, 4000K, 5000K or 6500K. It cannot be changed later without opening the ceiling. Pick it against the rest of the room’s lighting, not in isolation. If the white has to move across the day, specify a tunable white run at 2700K to 6500K alongside the color field and budget it up front.

Driver access

Not negotiable. Drivers, supplies, decoders and DALI gear go in a closet, above a cabinet, or behind an access hatch, and that location belongs on the drawings. We give you the rack footprint early so it does not turn into a change order at rough-in.

Printed and backlit

A printed translucent membrane sits over the same RGBW field. Understand that the print’s color shifts under saturated light and will not read the way it does under white. Mock it up every time. We print a sample, backlight it in the shop, and you approve the actual thing rather than a proof on paper.

Control cabling

DMX512-A wants 120 ohm shielded twisted pair, daisy chained, terminated at the last device, 32 devices maximum per run, splitters where the layout needs branches. Star wiring a DMX run is the most common control failure we get called out to fix, and it is usually not our cable.

Mockups

On anything over about 200 square feet, or anything with a signature color scene, build a mockup. We make a mockup box at the real cavity depth with the real strip and the real membrane, and you look at it in the real room under the real ambient light. That is the honest substitute for a photometric calculation we cannot run for you, and it settles more arguments than a spreadsheet ever has.

Data

Specifications

Full technical specifications
System
24V RGBW LED field behind a tensioned translucent membrane
Full ceiling field, cove, recessed linear line, luminous shape or wall panel.
LED
24V constant voltage RGBW in a 4-in-1 package
Minimum 60 packages per meter (about 18 per foot) for saturated color fields. Entire visible field ordered from one production lot, plus 10% labelled attic stock.
White channel
2700K, 3000K, 3500K, 4000K, 5000K or 6500K, fixed at order
5-channel RGB plus tunable white 2700K to 6500K available where the white has to move across the day.
CRI
Strips rated CRI 90+ by their own manufacturer on the white channel
We hold no independent CRI testing of our own and make no claim beyond the strip manufacturer’s published rating.
Control
DMX512-A with RDM, Art-Net or sACN for pixel work
DALI-2 (DT8) for BMS integration, wireless mesh for retrofits. 0-10V dims a single channel only and cannot do color.
Dimming resolution
16-bit decoders specified wherever slow fades are part of the design
8-bit steps visibly across a large even field.
PWM frequency
3 kHz or higher
Specified in any room that gets filmed or photographed for content.
Zoning vs pixel
Constant voltage decoder per zone, or addressable pixel control
Decoder per zone for solid color scenes. Addressable pixel control plus a pixel controller where gradients, sweeps or chases are required. The wiring is not interchangeable, so the choice is made at design.
Membrane
Translucent PVC, approx. 8 mil nominal (7 to 10 mil depending on finish)
Welded to size in our shop, harpoon edge, heated and tensioned into the profile on site.
Light transmission
42.0% diffused, 70.5% transparent
Measured at Poznan University of Technology by the method in CIE 130-1998. This is a test report, not a certificate. We use the diffused grade behind LED; transparent does not hide the diodes.
Weld lines
Faintly visible when backlit
Large fields are welded from roll widths. Weld layout is coordinated on the reflected ceiling plan before fabrication so the line falls where the design wants it.
Cavity depth (shop standard)
1.5 x LED row spacing for RGBW, 6 in absolute minimum for a full field
8 to 10 in preferred. 2 x pixel pitch where pixel effects are used. Field derived, not laboratory data.
Profiles
Extruded 6063 aluminum, white powder coat or mill finish
AP-301 / AP-302 / AP-302-W cove, AP-305 / AP-306 / AP-307 linear mini, midi and maxi, AP-212 / AP-213 LuxForm, AP-216 floating shapes. 6.5 ft stock on most; AP-213 is 4000 mm (13 ft 1-1/2 in) with 8 in and 4.5 in profile heights. Cross-sections in the profile library.
Shape
Any outline
Profiles bent on our own CNC in Dania Beach, dry fit in the shop, shipped to site as a numbered kit.
Driver and control access
Required
Drivers, supplies, decoders and DALI gear go in a closet, above a cabinet or behind an access hatch shown on the drawings. Everything from driver to LED is low voltage.
Fire
ASTM E84, per finish, white specimens: gloss FSI 5 / SDI 300, matte FSI 10 / SDI 300, satin FSI 15 / SDI 250
The laboratory assigned no classification. Specimens were not mounted per ASTM E2573. Membrane only, not a plenum assembly. Not permitted in return-air plenums on this data.
Approvals
None held for this assembly
No Florida Product Approval and no Miami-Dade NOA. If your permit path requires one, raise it at design rather than at submittal.
Acoustics
No NRC and no ASTM C423 absorption data held for this system, and we quote none
Where absorption is required we detail acoustic areas separately, outside the backlit zone, specified against the acoustic material manufacturer’s own published data.
Warranty
Membrane 10 years. LED and electrical 3 years
Membrane can be released from the profile and re-tensioned, so the cavity stays serviceable.
Fabrication and coverage
Fabricated, welded and CNC bent in our Dania Beach, Florida shop
Installed across Miami-Dade, Broward and Palm Beach. Materials shipped nationally.
Mockup
Available before commitment
Built at the real cavity depth with the real strip and the real membrane, viewed in the real room.
FAQ

Questions we get

Why RGBW instead of RGB?

Because RGB does not make a white you would accept on a ceiling. Mixing red, green and blue gets you near white, but the spectrum is spiky, it renders skin and finishes badly, and it drifts as the three channels age at different rates. That is the physics of three narrow bands, not a measured result of ours. RGBW adds a fourth dedicated white die in the same package, at a CCT you pick, so the ceiling is a normal white ceiling most of the time and a color ceiling when you ask. Pastels are the other reason. On RGB a soft pink means running three channels at very low output where the stepping shows. On RGBW it means white at a comfortable level with a little red added, which is stable, smooth and repeatable from one scene recall to the next.

How deep does the cavity need to be, and what do I hold in the reflected ceiling plan?

Our shop standard is cavity depth at or above 1.5 times the LED row spacing for RGBW, with a hard floor of 6 in from LED face to the back of the membrane on a full field. 8 to 10 in is where fields look their best. Also hold an accessible location for the drivers and control gear, keep ducts, sprinkler drops and hangers out of the luminous area because everything in that cavity casts a shadow, and give us the finished membrane plane plus the perimeter condition. Send the RCP and a section early and we will mark the cavity, the row layout, the feed points and the driver rack on it, before the ceiling gets value engineered down to 4 in.

Can you give me IES files or photometric data for my lighting calculation?

No, and we will not pretend otherwise. We hold no LM-79, no LM-80 and no TM-21 data for this assembly, we publish no IES files for it, and we publish no lumen, footcandle or efficacy numbers. What we do hold is the membrane light transmission test report from Poznan University of Technology, 42.0% diffused and 70.5% transparent, measured by the method in CIE 130-1998. The strip manufacturer publishes their own data for the LED product itself, and we will name exactly which product is specified so you can get it from them. For anything that has to be signed off visually we build a mockup at the actual cavity depth and you look at it. On a diffused luminous ceiling that answers the question better than a calculation would.

Can this go in a return air plenum?

Not on the data we hold. Our ASTM E84 results are per finish, on white specimens: gloss flame spread 5 and smoke developed 300, matte 10 and 300, satin 15 and 250. The laboratory assigned no classification. The specimens were not mounted per ASTM E2573, and the test covers the membrane alone, not a plenum assembly. So we do not permit this system in a return air plenum on this data, and we will tell your AHJ the same thing. We also hold no NFPA 701 test, no NFPA 286 or NFPA 265 room-corner test, no UL 2043 rating, no Florida Product Approval and no Miami-Dade NOA for this assembly. If your specification calls for any of those, raise it at design and we will tell you in writing what we can and cannot meet.

Can we run gradients and chases, or is it one color at a time?

Both, and they are different jobs. A zoned system uses a constant voltage decoder per zone and each zone is one color at a time. That covers most hospitality and retail work: an entry field, a bar field, a cove, moving together or independently. Gradients, sweeps and video effects need addressable pixel control, more data runs, a pixel controller, and more cavity depth so the pixels blend instead of reading as dots. Decide which one you are buying at design, because the wiring is not the same and adding pixel control later means opening the ceiling.

How does staff actually run it day to day?

With an engraved keypad on the wall, four to six scenes, and a lockout so nobody leaves the lobby magenta at 9am. Phone apps are useful for the designer and useless for a front desk. We can run scenes on DMX512-A with a show controller, on DALI-2 DT8 where the building already has DALI and facilities wants it in the BMS, or on a wireless mesh where pulling control cable is not realistic in a retrofit. 0-10V dims one channel and cannot do color, so it should not appear on the control drawings for this system. If there is an AV integrator we hand them a channel map and they trigger scenes from Crestron, Control4 or Savant.

Documentation

Downloads for this system

What we hold today and issue on request. The published files sit in the lighting technical library, and the full set is in technical downloads.

  • AP-301 / AP-302 / AP-302-W cove light profile drawings, DWG and PDF
  • AP-305 / AP-306 / AP-307 linear light mini, midi and maxi profile drawings, DWG and PDF
  • AP-212 / AP-213 LuxForm profile drawings, DWG and PDF, including AP-213 4000 mm with 8 in and 4.5 in heights
  • AP-216 floating shapes profile drawing, DWG and PDF
  • AP-213 Revit family (.rfa), geometry only, no photometric data attached
  • Membrane light transmission test report, Poznan University of Technology, method per CIE 130-1998 (42.0% diffused / 70.5% transparent). Test report, not a certificate
  • ASTM E84 surface burning test report, results stated per finish on white specimens. The laboratory assigned no classification
  • Warranty statement: membrane 10 years, LED and electrical 3 years

Reserved and not yet published. Listed by name so nobody assumes it exists:

  • RGBW cavity depth and row spacing worksheet, one page of our shop standard. Reserved slot, not yet issued
  • Typical RGBW ceiling section detail in CAD: cavity, back plane, strip rows, feed points, driver zone. Reserved slot
  • Sample DMX patch and channel schedule template. Reserved slot
  • IES and photometric files for the RGBW luminous field. Reserved slot, blocked until goniophotometer testing is commissioned. There is nothing to publish and we will not put up a download button that 404s
  • LM-79 report for the specified strip as installed. Reserved slot, blocked on the same testing
  • CSI 3-part specification section for color changing ceilings. Reserved slot, in drafting
  • Scene programming and handover checklist, the client-facing closeout document. Reserved slot
The difference

Why a panel manufacturer cannot do this

A panel manufacturer sells tiles, panels and modules that you assemble into a rectangle, sized by what their tooling already makes. A color field is not a module. We bend the frame on our own CNC and weld the membrane to fit, so the field can be a curve, an island, a closed ring, a wall or a printed graphic, at whatever size the room gives us. It arrives as one drawing set, one crew and one Florida lead time instead of a product, plus a trim package, plus a separate ceiling contractor to install it.

Working on drawings?

Our profile cross-sections, dimensions and the full color chart live in the technical library. CAD files are sent on request, usually within one business day.

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Put color in the ceiling, and keep the white

Send the reflected ceiling plan and a section. We mark the cavity, the row layout, the feed points and the driver rack, and price it from our own shop.

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