1. Introduction
The Sun System® Rail System (RS) 1850 LED is a high-performance, 6-rail foldable LED fixture designed for use in greenhouses and climate rooms. It delivers 1850 µmol/s with an efficiency of 2.5 µmol/j, providing a full-spectrum light source utilizing top-bin Sun System-brand diodes. This fixture is DLC listed and IP65 wet-rated, ensuring durability and suitability for various environments.
The RS 1850 LED operates at 120-277 volts and features a manual digital dimming button for basic control. For advanced control, an internal embedded smart controller allows compatibility with the Gavita e-Series Controller (sold separately), enabling control of up to 500 fixtures.

Figure 1: Sun System RS 1850 LED in its unfolded, operational configuration.
2. Safety Information
Please read all safety instructions carefully before installation and operation. Failure to follow these instructions may result in electric shock, fire, or other injuries.
- Always disconnect power before installing, cleaning, or servicing the fixture.
- Ensure the power source voltage (120-277V) matches the fixture's requirements.
- Installation should be performed by a qualified electrician in accordance with local electrical codes.
- Do not operate the fixture if the power cord or plug is damaged.
- Avoid direct eye exposure to the LED light when the fixture is operating.
- This fixture is IP65 wet-rated, suitable for damp and wet locations, but should not be submerged in water.
- Keep the fixture away from flammable materials.
3. Package Contents
Verify that all components are present and undamaged upon opening the package.
- Sun System RS 1850 LED Fixture (1 unit)
- Power Cord (1 unit)
- Hanging Hardware (e.g., V-hangers, adjustable rope ratchets - specific type may vary)
- Instruction Manual (this document)
4. Setup and Installation
The Sun System RS 1850 LED is designed for suspended installation.
- Unpack the Fixture: Carefully remove the fixture and all components from the packaging.
- Inspect for Damage: Check the fixture for any visible damage that may have occurred during shipping. Do not install if damaged.
- Unfold the Fixture: The fixture is foldable for compact shipping. Gently unfold the light rails until they are fully extended and locked into position.
- Mounting Location: Select a suitable location for suspension, ensuring the mounting structure can safely support the fixture's weight (approximately 32.7 pounds).
- Install Hanging Hardware: Securely attach the provided hanging hardware to the fixture and the overhead support structure. Ensure the fixture is level.
- Connect Power: Plug the power cord into the fixture's input port, then connect it to a grounded electrical outlet (120-277V). Ensure the connection is secure.

Figure 2: The fixture in a partially folded state, illustrating its compact design.

Figure 3: Side view of the fixture, highlighting the integrated hanging points for suspension.

Figure 4: The fixture fully folded, demonstrating its compact form for storage or transport.
5. Operating Instructions
The Sun System RS 1850 LED offers both manual and advanced control options.
5.1 Manual Operation
The fixture is equipped with a manual digital dimming button.
- Press the button once to cycle through preset dimming levels: 100%, 75%, 50%, and OFF.
- This button provides basic on/off and dimming functionality without an external controller.
5.2 Advanced Control with Gavita e-Series Controller
For comprehensive control, the RS 1850 LED features an internal embedded smart controller compatible with the Gavita e-Series Controller (sold separately).
- Connect the fixture to a Gavita e-Series Controller using appropriate cables (not included).
- The Gavita controller allows for precise dimming adjustments, typically in 10% increments, from a minimum output of 50% up to 100%.
- This setup enables control of up to 500 fixtures from a single controller, facilitating automated lighting schedules and intensity adjustments.
- Refer to the Gavita e-Series Controller manual for detailed setup and operation instructions.
6. Maintenance
Regular maintenance ensures optimal performance and longevity of your Sun System RS 1850 LED fixture.
- Cleaning: Periodically clean the fixture's surfaces with a soft, dry cloth to remove dust and debris. For stubborn dirt, use a slightly damp cloth. Do not use harsh chemicals or abrasive cleaners.
- Inspection: Regularly inspect the power cord, plug, and hanging hardware for any signs of wear, damage, or loose connections.
- Ventilation: Ensure adequate airflow around the fixture to prevent overheating. Do not block ventilation openings.
- Power Disconnection: Always disconnect the power supply before performing any cleaning or maintenance.
7. Troubleshooting
This section addresses common issues you might encounter with your Sun System RS 1850 LED fixture.
| Problem | Possible Cause | Solution |
|---|---|---|
| Fixture does not turn on. | No power supply; loose connection; faulty outlet. | Check power cord connection. Ensure outlet has power. Try a different outlet. |
| Light output is inconsistent or flickers. | Unstable power supply; loose wiring; internal fault. | Check power connections. If using a controller, ensure it's properly connected and configured. If problem persists, contact support. |
| Cannot dim the light effectively. | Using manual button for precise dimming; no Gavita controller connected. | The manual button cycles through fixed levels (100%, 75%, 50%, OFF). For finer control (10% increments from 50-100%), a Gavita e-Series Controller is required. |
| Fixture is hot to the touch. | Normal operation; insufficient ventilation. | Some heat is normal. Ensure adequate airflow around the fixture. Do not enclose the fixture in a confined space without proper ventilation. |
8. Specifications
| Attribute | Detail |
|---|---|
| Model Name | Sun System RS 1850 LED |
| Model Number | HGC906145 |
| Brand | Sun System |
| Light Source Type | LED (Full Spectrum) |
| Number of Light Sources | 6 Rails |
| Wattage | 720 Watts |
| Voltage | 120-277 Volts |
| Efficiency | 2.5 µmol/j |
| PPF Output | 1850 µmol/s |
| Brightness | 6540 lumens |
| Product Dimensions (L x W x H) | 47.56"L x 24.21"W x 9.33"H |
| Item Weight | 32.7 pounds |
| IP Rating | IP65 (Wet-rated) |
| Control Method | Manual Digital Button / Remote (via Gavita e-Series Controller) |
| Installation Type | Suspended |
| Material | Glass (Shade), Other (Fixture Body) |
| Color | White |
| DLC Listed | Yes |
| UPC | 849969030013 |
9. Warranty Information
The Sun System RS 1850 LED fixture is covered by a 5-year manufacturer's warranty. This warranty covers defects in materials and workmanship under normal use. Please retain your proof of purchase for warranty claims.
For detailed warranty terms and conditions, or to initiate a warranty claim, please contact Sun System customer support.
10. Support and Contact Information
If you have any questions, require technical assistance, or need to report an issue with your Sun System RS 1850 LED fixture, please contact Sun System customer support.
Manufacturer: Hawthorne Hydroponics, LLC
Brand: Sun System
(Specific contact details such as phone number or email are not provided in the product data. Please refer to the official Sun System website or product packaging for the most current support information.)
You can also visit the official Sun System store on Amazon for more information: Sun System Store





