LightRail 3.5 6′ Add A Lamp(6′ Push Rod/6′ Rail)

The LightRail 3.5 6' Add A Lamp is a slave expansion unit that attaches to an existing LightRail 3.5 motorized rail system, adding a second lamp position to your grow space. With a 6' push rod and 6' rail, it allows you to move two lights in tandem across your canopy, increasing the effective coverage area of a single light-mover drive unit. Note: the hardware pack (LRAALHDWARE) is required and must be ordered separately.

LightRail 3.5 Add A Lamp Specifications

Core dimensions and ratings derived from the manufacturer's product listing. The Add A Lamp unit is designed exclusively as a slave attachment for the LightRail 3.5 motor drive; it does not include its own motor.

Specification	Value
Brand	Light Rail
SKU / Part Number	LRAAL3.5
Unit Type	Add A Lamp slave (expansion unit, no motor)
Rail Length	6 ft
Push Rod Length	6 ft
Load Rating (LightRail 3.5)	Up to 35 lbs
Hardware Pack Included	No — order LRAALHDWARE separately
Compatible Drive Unit	LightRail 3.5 motor

Why Choose the LightRail 3.5 Add A Lamp

Light movers are a practical way to reduce hot spots and stretch light coverage across a wider canopy without adding a second complete fixture and timer circuit. The Add A Lamp unit takes that further by letting a single LightRail 3.5 drive unit pull two lamp positions simultaneously across the same rail path.

• Doubles your lamp positions on one motor: One LightRail 3.5 drive unit moves both the primary fixture and the Add A Lamp slave together, so you add coverage without adding a second motor or controller.
• 6' rail and 6' push rod configuration: The matched 6-foot rail and push rod dimensions are sized for standard grow room bays, providing a consistent travel distance suited to 4'–6' wide canopy areas.
• Rated up to 35 lbs for the 3.5 system: The LightRail 3.5 motor is rated to 35 lbs total, which accommodates a broad range of HID, CMH, and lighter LED fixtures within that weight envelope.
• Straightforward expansion path: For growers already running a LightRail 3.5 system, the Add A Lamp is the direct manufacturer-supported expansion component rather than a third-party adapter or workaround.
• Compatible with heavier loads via LightRail 5.0: If your fixture pair exceeds 35 lbs, the LightRail 5.0 system (rated to 100 lbs) offers the same Add A Lamp architecture at a higher weight capacity.

Best Uses for the LightRail 3.5 Add A Lamp

This unit is purpose-built for growers who already have a LightRail 3.5 motor installed and want to run a second lamp on the same travel path. It is not a standalone product — it requires the motor drive and the LRAALHDWARE pack to function.

• Multi-lamp light-mover setups: Attach a second HID or CMH fixture to the Add A Lamp slave so both lamps sweep the canopy together on a single motor, reducing stationary hot spots under each fixture.
• Medium-density grow rooms (4'–6' wide bays): The 6-foot rail is well-suited to rooms with canopy widths in this range, where a stationary single lamp would leave edges under-lit.
• Weight-appropriate fixtures under 35 lbs total: Works with standard single-ended HPS, MH, CMH, and lighter DE or LED fixtures, provided the combined weight of all hanging hardware stays within the motor's 35 lb rating.
• Existing LightRail 3.5 installations: The cleanest use case is expanding an already-operational LightRail 3.5 setup. If you're also in the market for a full fixture, consider pairing with a T5 designer fixture for propagation areas or a high-output LED for flowering bays.
• Consistent coverage across longer canopy rows: In rooms where plants are arranged in a single long row, the 6-foot travel path distributes light more evenly than a fixed-mount position would across the same run.

Compatibility

The LightRail 3.5 Add A Lamp is designed specifically for use with the LightRail 3.5 motor drive. It is a slave component: it has no motor of its own and connects mechanically to the 3.5 drive unit via the push rod linkage. The following compatibility notes apply:

• Required companion: LightRail 3.5 motor drive — The Add A Lamp does not work independently and is not cross-compatible with the LightRail 4.0 or 5.0 drive units without manufacturer verification.
• Required hardware pack: LRAALHDWARE — The mounting and connection hardware is sold separately. The Add A Lamp unit (LRAAL3.5) ships without this hardware; you must order LRAALHDWARE to complete the installation.
• Weight limit: 35 lbs total system load — This is the rated limit of the LightRail 3.5 motor. The combined weight of all fixtures, cords, and hangers on the entire rail system must stay within this limit. If your setup exceeds 35 lbs, look at the LightRail 5.0 system (rated to 100 lbs) instead.
• Fixture type: Works with any fixture that can be hung via a standard light hanger or hook within the weight limit. Common pairings include single-ended HPS, MH, CMH, and certain LED bar fixtures. For high-output LED setups, verify the fixture's hanging weight; larger LED panels like the Gavita Pro 1700e LED exceed the 3.5 system's weight rating and require the higher-capacity 5.0 system.
• Room dimensions: The 6' rail travel path requires adequate overhead clearance and a mounting span of at least 6 feet. Verify ceiling height and truss or rafter spacing before ordering.

Sources & Further Reading