# LNF-SIL-F2121 > LNF-SIL-F2121 is a dome silicone neon flex with a rounded 270° illuminated face for architectural contours: 11.5 × 29 mm, 12/24/36/48V, single colour to DMX pixel, IP68 sealed. ## Source - Canonical: [https://www.tpk-led.com/products/flexible-strip/lnf-sil-f2121/](https://www.tpk-led.com/products/flexible-strip/lnf-sil-f2121/) - Content type: Products - Language: en - Published: 2026-10-29T10:22:05+00:00 - Modified: 2026-10-30T03:06:13+00:00 - Product model: LNF-SIL-F2121 - Product series: LNF-SIL - Product family: Flexible Strip ## Content ![Warm-white rounded dome LED neon flex strip curving in an S shape against a light grey studio background](https://static.tpk-led.com/images/website/tpk-led/Product/LNF-SIL-F2121/lnf-sil-f2121-hero-dome-01.webp) # LNF-SIL- F2121 *Architectural Dome Neon Flex* Rounded-dome LED neon flex with a nominal 270° illuminated surface, horizontal bending and continuous architectural contours. Configure single color, RGB, RGBW, tunable white, SPI or DMX pixel lighting for custom installations. Light CCT 2700K3000K4000K 6500KRGBRGBW Section & bending**11.5 × 29 mm nominal · Horizontal bend** Electrical variants**12 / 24 / 36 / 48V DC · SKU dependent** Construction**Rounded 270° luminous face · IP68 factory-sealed option** **11.5×29**PROFILE · MM **270°**NOMINAL LIT FACE **6**LIGHTING MODES **IP68**SEALED ASSEMBLY **5 Years**TPK WARRANTY ## A luminous dome. Designed for architectural curves. ## A rounded 270° luminous surface. The raised light-emitting dome creates a continuous neon-style outline that stays visually prominent around curved building edges and decorative details. The 270° figure describes the luminous surface, not the photometric beam angle. ![Single warm-white dome-shaped LED neon flex strip curved on a dark studio floor](https://static.tpk-led.com/images/website/tpk-led/Product/LNF-SIL-F2121/lnf-sil-f2121-config-mono-01.webp) ## Six ways to control the line. Specify steady single-color light, adjustable tunable white, RGB/RGBW color mixing, SPI pixels or DMX-addressable runs. Electrical platforms vary by controller, power and wiring. ![Multicolored dome neon flex arranged in an S curve with red, blue and warm white sections](https://static.tpk-led.com/images/website/tpk-led/Product/LNF-SIL-F2121/lnf-sil-f2121-config-rgbw-01.webp) ## Horizontal bending for curved layouts. Plan arcs, illuminated handrails and sculptural contours using the specified horizontal bending direction. The minimum bend diameter is configuration-dependent: 80 or 120 mm. ![Coiled LED neon flex showing distinct green, amber, pink and cyan pixel effects](https://static.tpk-led.com/images/website/tpk-led/Product/LNF-SIL-F2121/lnf-sil-f2121-config-spi-01.webp) ## Compatible terminations and mounting. Factory-molded entry connectors, end caps and compatible mounting details support straight, side and bottom-entry installations. Select suitable sealed assemblies for wet locations. ![White molded bottom-entry cable connector designed for the rounded neon flex profile](https://static.tpk-led.com/images/website/tpk-led/Product/LNF-SIL-F2121/lnf-sil-f2121-feature-connector-01.webp) ## One dome profile. Six light-output families. ![Warm-white dome neon flex strip forming a long soft arc on a dark floor](https://static.tpk-led.com/images/website/tpk-led/Product/LNF-SIL-F2121/lnf-sil-f2121-config-mono-01.webp) Choose light output & control Selected output **Single Color · CV / CC** Electrical configuration 5–15 W/m · 12–48V DC Cut interval 83.3–250 mm cutting interval Section & voltage 11.5 × 29 mm · voltage depends on variant ## Technical specifications. Twenty configurations across single color, RGB, RGBW, tunable white, SPI pixel and DMX pixel control, arranged by rated power from 5 to 18 W/m. Model / Configuration | Light Output | Supply | LED / m | Power / m | Luminous Flux / m | Cut Length | Single Feed | Double Feed | Pixels / m**LNF-SIL-F2121**MONO-05 · Single Color · 3528 CV | Single Color · 3528 CV | 24V DC | 72 | 5 W/m | 149.9 (3000K) lm/m | 16.67 cm | 15 m | 30 m | — **LNF-SIL-F2121**MONO-06 · Single Color · 3528 CV | Single Color · 3528 CV | 12V DC | 72 | 5 W/m | — | 8.33 cm | 7 m | 14 m | — **LNF-SIL-F2121**MONO-03 · Single Color · 5050 CV | Single Color · 5050 CV | 24V DC | 60 | 7.2 W/m | — | 16.67 cm | 15 m | 30 m | — **LNF-SIL-F2121**MONO-07 · Single Color · 2835 CC | Single Color · 2835 CC | 24V DC | 72 | 10 W/m | — | 8.33 cm | 15 m | 30 m | — **LNF-SIL-F2121**MONO-02 · Single Color · 5050 CV | Single Color · 5050 CV | 24V DC | 60 | 12 W/m | — | 10 cm | 10 m | 20 m | — **LNF-SIL-F2121**MONO-04 · Single Color · 5050 CV | Single Color · 5050 CV | 36V DC | 60 | 12 W/m | — | 16.67 cm | 15 m | 30 m | — **LNF-SIL-F2121**MONO-08 · Single Color · 5050 CV | Single Color · 5050 CV | 48V DC | 60 | 12 W/m | — | 25 cm | 20 m | 40 m | — **LNF-SIL-F2121**RGB-01 · RGB · 5050 PWM CV | RGB · 5050 PWM CV | 24V DC | 60 | 12 W/m | — | 10 cm | 10 m | 20 m | — **LNF-SIL-F2121**RGB-03 · RGB · 5050 PWM CV | RGB · 5050 PWM CV | 48V DC | 60 | 12 W/m | — | 16.67 cm | 20 m | 40 m | — **LNF-SIL-F2121**DMX_PIXEL-01 · DMX Pixel · 5050 DMX(UCS512B3) | DMX Pixel · 5050 DMX(UCS512B3) | 24V DC | 56 | 12 W/m | — | 12.5 cm | 7 m | 14 m | 8 **LNF-SIL-F2121**RGB-02 · RGB · 5050 PWM CV | RGB · 5050 PWM CV | 24V DC | 72 | 13 W/m | — | 8.33 cm | 10 m | 20 m | — **LNF-SIL-F2121**MONO-01 · Single Color · 5050 CV | Single Color · 5050 CV | 24V DC | 72 | 15 W/m | 363.1 (3000K) lm/m | 8.33 cm | 8 m | 16 m | — **LNF-SIL-F2121**TUNABLE_WHITE-01 · Tunable White · 2835 PWM | Tunable White · 2835 PWM CV | 24V DC | 120 | 15 W/m | — | 10 cm | 10 m | 20 m | — **LNF-SIL-F2121**SPI_PIXEL-02 · SPI Pixel · 5050 SPI(8904) | SPI Pixel · 5050 SPI(8904) | 24V DC | 56 | 15 W/m | — | 12.5 cm | 8 m | 16 m | 8 **LNF-SIL-F2121**DMX_PIXEL-02 · DMX Pixel · 5050 DMX(RS485) | DMX Pixel · 5050 DMX(RS485) | 24V DC | 70 | 15 W/m | — | 10 cm | 8 m | 16 m | 10 **LNF-SIL-F2121**SPI_PIXEL-01 · SPI Pixel · 5050 SPI(8903) | SPI Pixel · 5050 SPI(8903) | 24V DC | 70 | 16 W/m | — | 10 cm | 8 m | 16 m | 10 **LNF-SIL-F2121**RGBW-01 · RGBW · 5050 PWM CV | RGBW · 5050 PWM CV | 24V DC | 60 | 17 W/m | — | 10 cm | 8 m | 16 m | — **LNF-SIL-F2121**RGBW-02 · RGBW · 5050 PWM CV | RGBW · 5050 PWM CV | 24V DC | 72 | 17 W/m | — | 8.33 cm | 8 m | 16 m | — **LNF-SIL-F2121**RGBW-03 · RGBW · 5050 PWM CV | RGBW · 5050 PWM CV | 12V DC | 60 | 17 W/m | — | 5 cm | 5 m | 10 m | — **LNF-SIL-F2121**DMX_PIXEL-03 · DMX Pixel · 5050 DMX(RS485) | DMX Pixel · 5050 DMX(RS485) | 24V DC | 70 | 18 W/m | — | 10 cm | 8 m | 16 m | 10 Rated power and permitted feed length depend on the selected electrical configuration. A 20 m carton or 10 m retail box is a shipment length, not an electrical circuit length. ## Light distribution. ### Polar light distribution · measured samples ![Polar candela distribution plot for F21 · 3528 / 72 · 3000K, showing measured angular intensity curves and photometric test axes](https://static.tpk-led.com/images/website/tpk-led/Product/LNF-SIL-F2121/lnf-sil-f2121-photometry-f21-24v-3528-72-3000k-01.svg) F21 · 3528 / 72 · 3000K ### Photometric configurations Five 1 m photometric distributions, with measured light outputs of 149.9–363.1 lm depending on LED source and color temperature. Download the relevant IES/LDT file in the technical pack when preparing the lighting calculation for your chosen configuration. ## Dimensions & drawings. ![LNF-SIL-F2121 cross-section dimension diagram showing 11.5 mm bottom width, 28 mm drawn height and 15.5 mm luminous dome width](https://static.tpk-led.com/images/website/tpk-led/Product/LNF-SIL-F2121/lnf-sil-f2121-cad-cross-section-01.webp) LNF-SIL-F2121 · rounded dome section01 Profile width**11.5 mm (base)** Profile height**29 mm nominal** Bending orientation**Horizontal bending** The rounded dome has a nominal 270° luminous face. The section drawing identifies the base, overall contour and emitting surface geometry. Choose the correct mounting profile and connector type for the required curve, bend diameter and installation environment. ## Packaging & logistics. Model**LNF-SIL-F2121** Pack Quantity**20 m / carton** Carton Dimensions**33 × 33 × 18 cm** Gross Weight**10.4 kg** Pack quantity refers to shipment length; maximum permissible electrical run lengths are specified separately by platform. ![Paper reel of pale blue flexible neon strip with brown shipping cartons shown at different packing stages](https://static.tpk-led.com/images/website/tpk-led/Product/LNF-SIL-F2121/lnf-sil-f2121-pkg-reel-20m-01.webp) ## Applications. **01** / 12 ![Wide airport terminal building with a curved golden roof and aircraft parked in front](https://static.tpk-led.com/images/website/tpk-led/Product/LNF-SIL-F2121/lnf-sil-f2121-scene-app-01.webp) ### Airport terminal rooflines Outline lighting for large terminal envelopes and curved airport canopy architecture. ![Cable-stayed bridge at night with multicolor illumination following suspension cables and the deck](https://static.tpk-led.com/images/website/tpk-led/Product/LNF-SIL-F2121/lnf-sil-f2121-scene-app-02.webp) ### Bridge cable lighting Dynamic color lines trace the geometry of stay cables, towers and the bridge deck. ![Curved multi-story hotel facade outlined by warm-white linear lighting beside a pool](https://static.tpk-led.com/images/website/tpk-led/Product/LNF-SIL-F2121/lnf-sil-f2121-scene-app-03.webp) ### Curved hotel facades Warm exterior contours accentuate the balcony lines and curved facade beside a reflecting pool. ![Dark gym interior with continuous suspended luminous loops above exercise equipment](https://static.tpk-led.com/images/website/tpk-led/Product/LNF-SIL-F2121/lnf-sil-f2121-scene-app-04.webp) ### Gym interior loops Suspended continuous luminous rings create overhead accents in a modern fitness space. ![Curved wooden stair handrail with a continuous warm illuminated strip running along its underside](https://static.tpk-led.com/images/website/tpk-led/Product/LNF-SIL-F2121/lnf-sil-f2121-scene-app-05.webp) ### Stair and handrail accents Discrete warm-white linear lighting follows a curved timber handrail and stepped circulation. ![Indoor parking garage with continuous linear lighting embedded along the concrete floor](https://static.tpk-led.com/images/website/tpk-led/Product/LNF-SIL-F2121/lnf-sil-f2121-scene-app-06.webp) ### Parking floor guidance Recessed illuminated floor lines define circulation routes inside a concrete parking garage. ![Contemporary auditorium with concentric flowing cyan light lines tracing the sculptural ceiling](https://static.tpk-led.com/images/website/tpk-led/Product/LNF-SIL-F2121/lnf-sil-f2121-scene-app-07.webp) ### Auditorium ceiling contours Flowing aqua light bands emphasize the layered sculptural ceiling of a performance hall. ![Vintage theater facade at night with pink and purple neon sign outlines and vertical lettering](https://static.tpk-led.com/images/website/tpk-led/Product/LNF-SIL-F2121/lnf-sil-f2121-scene-app-08.webp) ### Theater sign lighting Colored neon-style letter outlines highlight a vintage theater entrance and marquee. ![Snowy mountain ski slope at dusk with red green and blue illuminated lines beside the track](https://static.tpk-led.com/images/website/tpk-led/Product/LNF-SIL-F2121/lnf-sil-f2121-scene-app-09.webp) ### Ski slope visual wayfinding Bright multi-color light traces define the edges of an alpine ski course at dusk. ![Outdoor swimming pool in daylight with a narrow turquoise illuminated strip tracing the curved pool wall](https://static.tpk-led.com/images/website/tpk-led/Product/LNF-SIL-F2121/lnf-sil-f2121-scene-app-10.webp) ### Curved pool edges A narrow turquoise light accent follows the contour of a swimming pool wall. ![Resort swimming pool at night with linear lighting beneath a terrace and along the water edge](https://static.tpk-led.com/images/website/tpk-led/Product/LNF-SIL-F2121/lnf-sil-f2121-scene-app-11.webp) ### Resort pool terraces Linear accents define the water-side terrace and poolside architecture at night. ![Luxury yacht lounge with magenta ceiling accent lighting and warm linear strips along the seating](https://static.tpk-led.com/images/website/tpk-led/Product/LNF-SIL-F2121/lnf-sil-f2121-scene-app-12.webp) ### Yacht cabin lighting Magenta cove lighting and warm linear accents illuminate a luxury yacht lounge. ## Frequently asked questions. What does a 270° luminous surface mean? The rounded dome has a nominal illuminated surface spanning approximately 270° around the profile. This describes the visible light-emitting enclosure; actual candela distribution is shown in the photometric curves.How are voltage and control configurations selected? F2121 has multiple electrical platforms: 12, 24, 36 and 48V DC are available on specific variants. Single color, RGB, RGBW, tunable white, SPI and DMX pixel systems require matching controllers, drivers and cable design.What is the minimum bending diameter? The product bends horizontally. A minimum bending diameter of 80 mm or 120 mm is specified depending on the selected configuration. Confirm the exact bending requirement when detailing the mounting route.What is the difference between carton length and electrical run length? A paper reel contains 20 m of product, while each white box contains 10 m. Permitted electrical feed lengths vary by platform; 48V single-color and RGB options can support longer runs than several 12V and 24V versions. ## Discovery - Site index: [https://www.tpk-led.com/llms.txt](https://www.tpk-led.com/llms.txt) - Section index: [https://www.tpk-led.com/products/llms.txt](https://www.tpk-led.com/products/llms.txt)