Which controller does a piece of LED neon flex need? That depends on its version, not its profile. On 24V profiles, mono runs on a driver or dimming decoder, tunable white on a two-channel controller, RGB and RGBW on a decoder, SPI on a pixel controller; constant-current profiles are set at quote.
Five Versions, One Chain
Our neon page lists five versions: mono, tunable white (CCT), RGB, RGBW and SPI addressable, all on 24V. The version usually sets how many conductors a circuit has and which controller reads them. On strip, our wiring guide counts two conductors for single color, three for tunable white, four for RGB and five for RGBW; the lead on a neon piece and its pinout are confirmed at quote.
| Version | Conductors (as on strip) | Controller on our controllers page | What feeds it |
|---|---|---|---|
| Mono | 2 | A 0-10V or TRIAC driver, or a fixed driver with UT-C010-350 (0-10V, 350 W, 1 channel) | 24V constant-voltage driver; constant-current profiles need a constant-current driver |
| Tunable white | 3 | UT-CDALI-DT8 (DALI DT8, 2 CCT channels, 360 W); other tunable controllers at quote | A driver sized to the piece load |
| RGB | 4 | UT-CDMX-480 (DMX512, 4 channels, 480 W) or UT-CRF-24G (2.4G RF, 4 zones, 360 W) | On 24V profiles, a 24V driver behind the decoder, with amplifier UT-CAMP-4 for more zones; constant-current profiles at quote |
| RGBW | 5 | The same decoders, one zone per four channels | As RGB |
| SPI | 3 on most SPI strip, 4 with breakpoint resume | UT-CSPI-2048 (2,048 pixels, app and RF remote) | A 24V driver plus a data line from the controller; pinout at quote |
The “constant-current drivers” cell is our drivers page speaking: constant-current strip and constant-current neon run on constant-current drivers, matched at quote. A constant-voltage supply does not run a constant-current profile.
- 1Mono2 conductorsController: 0-10V or TRIAC driver, or UT-C010-350. Driver: constant voltage, or a constant-current driver on CC profiles
- 2Tunable white3 conductorsController: UT-CDALI-DT8, or RF or 0-10V. Driver: constant voltage sized to the piece
- 3RGB4 conductorsController: UT-CDMX-480 or UT-CRF-24G. Driver: constant voltage behind the decoder on 24V profiles
- 4RGBW5 conductorsThe same decoders with four channels. Driver: constant voltage behind the decoder on 24V profiles
- 5SPI pixel3 or 4 conductorsController: UT-CSPI-2048. Driver: constant voltage, plus a data line
Which Profiles Come in Which Version
The versions are not offered on every profile. From our neon page, with the maximum run per feed shown as the page gives it:
| Version | Profiles that list it | Max run per feed |
|---|---|---|
| Mono | Seven of the nine families, from UT-N0606-TB to UT-N5025-TB (not the addressable or camouflage families) | 16 ft (5 m) on the standard 24V profiles, the three large profiles on request; 49 to 98 ft (15 to 30 m) on the CC top-bend and side-bend profiles |
| Tunable white | UT-N1010-TB, UT-N1212-TB, UT-N1616-TB, UT-N2020-TB, UT-N0612-SB, UT-N1212-SB, UT-NN12, UT-N1616-S-MC | 16 ft on UT-N1010-TB, UT-NN12 and UT-N1616-S-MC; 49 to 98 ft on the CC profiles |
| RGB | UT-N1212-TB, UT-N1616-TB, UT-N2020-TB, UT-N2525-TB, UT-N0612-SB, UT-N1212-SB, UT-N1616-3D (DMX512 RGB), UT-ND18-360, UT-ND25-360, UT-N1212-AG, UT-N1610-AG, UT-CSP-540-N12-RGB | 49 to 98 ft on the CC profiles; 16 ft on the 360° round and anti-glare profiles; UT-N2525-TB on request |
| RGBW | UT-N1616-TB, UT-N2020-TB, UT-N2525-TB, UT-N3017-TB, UT-N1616-SB, UT-N1616-3D, UT-N1616-68 | 62 to 98 ft on the CC top-bend and 82 ft on UT-N1616-SB; 16 ft on UT-N1616-3D and UT-N1616-68; the large profiles on request |
| SPI | UT-N1010-SPI, UT-N1616-SPI (SPI RGB/RGBW), plus SPI RGB options on UT-ND18-360, UT-ND25-360 and UT-N1212-AG; UT-N1610-AG lists “RGB+IC”, which the page does not define | 16 ft (5 m) |
Two readings follow. Long runs are a constant-current feature: every listed run of 49 ft or more is a constant-current top-bend or side-bend profile, and color on a constant-current profile is where the page is silent about the driver and controller pair. And pixel neon is listed at 16 ft per feed, so a long SPI outline needs a feed every 16 ft; confirm how the data passes between pieces.
Mono and Tunable White
Mono neon is the simplest chain: a driver, optionally a dimming control, and the piece. Match the dimming to the driver: a 0-10V driver such as UT-D60-24-C2-010 or UT-D96-24-010 takes a 0-10V signal, and UT-D60-24-TRC takes a phase-cut dimmer. Load decides the driver. A 16 ft piece of UT-N1616-3D at 4.3 W/ft is 69 W, more than a 60 W Class 2 driver can carry; UT-D96-24-010 at 96 W holds it at 72%, inside the 80% loading rule our drivers page uses.
Tunable white adds a second channel. On strip, a three-conductor tunable white circuit has a shared positive, a warm row and a cool row, and a two-channel controller mixes them. On a DALI system that is UT-CDALI-DT8; on 0-10V or RF systems the controller changes but the three-conductor pattern stays, as our wiring diagram guide shows for strip. Our page gives no color temperature range for tunable neon, so ask for it at quote rather than assume the strip range.
RGB and RGBW
On 24V profiles, RGB neon needs a decoder or receiver with three channels in use, and RGBW needs four. UT-CDMX-480 is a four-channel DMX512 decoder rated 480 W in total; UT-CRF-24G is an RF receiver with four zones and 360 W. A decoder reading four channels drives one RGBW zone, so a sign with three independent letters needs three decoders or an addressed arrangement, as our DMX512 guide works through. Size each decoder channel for the largest single channel on the datasheet, not a quarter of the total.
Three points are specific to neon. The first is that a color piece is cut at the marked cut points, every 3.94 in (100 mm) on most profiles and every 1.97 in (50 mm) on UT-N2525-TB and UT-N3017-TB; each cut end gets an end cap and each feed end gets a lead, with the conductor count confirmed at quote. On strip, our wiring guide labels every conductor at both ends; ask for the same on neon leads. The second is that RGB and RGBW tell the controller different things: an RGB controller has no output for the white channel, so the white LEDs of an RGBW piece stay off. The third is the constant-current gap. The page lists RGB and RGBW on constant-current profiles such as UT-N1616-TB and UT-N2020-TB, and it does not name a driver and controller pair for them. Ask for the pair at quote; do not put a constant-voltage supply behind a constant-current color profile.
Some profiles list DMX512: UT-N2525-TB lists RGB or RGBW and UT-N3017-TB lists RGBW, both marked DMX512, and UT-N1616-3D lists a DMX512 RGB option. The page does not say whether those are fed through a decoder or addressed on the data line, so confirm that before the patch plan is drawn; it does not define the “RGB+IC” on UT-N1610-AG either.
SPI Pixel Neon
SPI neon puts the chips inside the profile, so each pixel is addressable and the controller sends a data stream along the piece. Our SPI profiles are UT-N1010-SPI and UT-N1616-SPI, with SPI RGB options on UT-ND18-360, UT-ND25-360 and UT-N1212-AG, all 16 ft (5 m) per feed. On SPI strip our guide counts three wires, V+, ground and data, and four with breakpoint resume; the connector has to match the pinout.
The pixel count sets the controller. UT-CSPI-2048 drives up to 2,048 pixels, and our page does not publish the neon pixel pitch or say whether the controller drives the RGBW pixels that UT-N1616-SPI lists; confirm both. For scale, ENTTEC’s 12 V SPI neon flex lists 20 pixels per meter. At that illustrative pitch, not one of our models, a 16 ft (4.88 m) piece has about 98 pixels, and one UT-CSPI-2048 would reach about 21 such pieces by pixel count alone. ENTTEC’s datasheet also says the pixel data “must travel in a specific direction” marked by an arrow on the neon. Ask whether our SPI profiles carry a direction mark, because a piece mounted against its data direction will not function as drawn. Our SPI vs DMX guide covers pixel controllers against decoders.
What the Profile Does to the Run
The profile sets the feeds, and the version sets the controller load. Take a 60 ft RGBW outline in a 16×16 mm profile at 4.3 W/ft, our page’s power figure for both rows, which loads 258 W either way:
| Plan | Profile | Feeds | Driver | Controller load |
|---|---|---|---|---|
| A: one constant-current run | UT-N1616-TB, RGBW, 62 ft (19 m) CC | 1 | Constant-current driver matched at quote | Pair set at quote |
| B: 24V pieces | UT-N1616-3D, RGBW, 24V, 16 ft (5 m) | 4 feeds of 15 ft, 64.5 W each | Non-Class 2: one UT-D150-24-L (150 W) per feed, or one UT-D400-24-L (400 W) with four home runs | 258 W on UT-CDMX-480 (54% of 480 W) or UT-CRF-24G (72% of 360 W) |
In plan B the four feeds can hang from one decoder if they are wired in parallel and the outline changes as one color. If each letter or section changes on its own, each zone needs its own decoder, or an amplifier such as UT-CAMP-4, which repeats the four PWM channels downstream and carries up to 384 W from its own supply. Plan B cannot use Class 2 drivers: each 15 ft feed is 64.5 W, above the 60 W rating of one Class 2 driver. At the 80% rule, a 150 W driver carries 120 W, so it takes one feed, and a 400 W driver carries 320 W, so it takes all four. Plan A has one feed but leaves the driver and the color controller as quote items. The two profiles differ in shape (top bend against 3D bend), so the choice starts with the bend and ends with the feeds. Our neon selection guide covers the bend, and our reel and run guide covers feeding from both ends.
Four Ways These Get Misordered
- An RGBW piece on an RGB controller. The controller has no output for the white channel, so the white LEDs stay off.
- A constant-current profile on a constant-voltage supply. The page is direct: constant-current neon runs on constant-current drivers.
- One decoder for an outline that must change in sections. A four-channel decoder is one RGBW zone; independent sections need more decoders or an amplifier.
- SPI pieces counted by feet, not pixels. The controller limit is a pixel total, and a piece mounted against its data direction will not function as drawn.
Other makers use other words for the same versions (LEDYi’s buying guide lists monochrome, tunable white, RGB, RGBW and DMX512 RGB/RGBW), so map a quote’s words to conductors and channels first.
Before You Order the Neon
- The version for every piece, written on the drawing: mono, tunable white, RGB, RGBW or SPI.
- The conductor count and pinout of the lead, confirmed at quote.
- Whether the profile is 24V or constant current, and the driver type that goes with it.
- The controller family and its total and per-channel ratings against the load.
- For SPI, the pixel pitch, the data direction mark and the pixel total against the controller.
- Feed count per outline, with the 16 ft limit on 24V and pixel profiles.
The profiles and controllers named above are on our LED neon flex page and our drivers, controllers and connectors page.
