built-in light seatpost SF
Next generation of built-in light seatpost

LightSKIN has expertise in embedding lights into seatposts. This time, it introduces a completely new approach.
LightSKIN has developed a technology that utilizes COB strips to emit light in a continuous line. To achieve this, it designed a uniquely structured seatpost that seamlessly connects the interior and exterior, allowing the COB strip to be securely mounted. At the top of the SF, a specialized lighting module meets StVZO standards. Beneath this module, a built-in COB strip further enhances visibility and safety for riders.

Features
Diameter (see drawing) | 27.2㎜ / 30.9㎜ |
Widths (see drawing) | D27.2mm(350mm) / D30.9mm(350, 400mm) |
Color and surface finish | Matt Black |
Seatpost Type | 2 bolt clamp offset 9㎜ mechanical stopper 14㎜ from top |
Material | Aluminum 6061 T6 |

Light unit
Light Module |
High brightness StVZO rear light module |
Power Source | The on-board battery of the e-bike |
Nominal voltage | DC 12V (6V-24V) |
Power consumption | 2W |
Light Module | High brightness StVZO rear light module |
Power Source | The on-board battery of the e-bike |
Nominal voltage | DC 12V (6V-24V) |
Power consumption | 0.48W |
Light Module | Red COB light strip |
COB length |
25㎜(Min, 1unit) to 225㎜(Max, 9units) |
Power Source | The on-board battery of the e-bike |
Nominal voltage | DC 12V (6V-24V) |
Power consumption |
SFE-C.4 0.6W (100㎜ COB) |

ETC
K-number | K 2532 |
Seatpost test standard |
EN15194, EN17404, ISO-M |
Compliant with standard or directive |
CE, RoHS, StVZO §22a TA Nr.14b (Rear lights fot bicycles), IPX6 |
Package Contents | Rear light seatpost |
The first built-in brake light seatpost

The SFB is a new rechargeable battery model in the SF series, combining a StVZO-compliant rear module with a red COB strip to preserve the signature built-in light design and design excellence, while remaining compatible with standard bicycles.
It features USB-C direct charging, a low voltage alert, and an automatic sleep mode triggered by a motion-sensitive vibration sensor.
Most notably, it integrates a brake light function that significantly enhances safety by clearly signaling deceleration to following traffic.

Features
Diameter |
27.2 / 30.9 (mm) |
Length |
D27.2mm(350mm) / D30.9mm(350, 400mm) |
Color surface finish | Matt Black |
Seatpost Type | 2 bolt clamp offset 9㎜ mechanical stopper 14㎜ from top |
Seapost material | Aluminum 6061 T6 |
Light unit
Light Module |
high brightness StVZO rear light module |
COB length |
125㎜ COB (5units) |
Power Source | Lithium-polymer battery 3.7V, 2000mAh, 8018120 with protection |
Mode | 2 rear light modes, 2 brake light modes, and mixture (To be finalized) |
ETC
Seatpost test standard |
ISO 4210-City, Mountain |
Compliant with standard or directive |
CE, RoHS, StVZO §22a TA Nr.14b |
Package Contents | rear light seatpost USB charge cable (200cm) |