Grow Light Lamp Cords & Power Cords
Grow light lamp cords and power cords are the electrical connections between grow fixtures and their power source -- replacement cords for damaged originals, extension cables for reaching remote panel locations, and specialty Wieland-format cords for commercial LED systems that use daisy-chain or multi-fixture power distribution. This collection covers power cords from Iluminar, Grow1, ThinkGrow, PHOTOBIO, and Gavita -- the primary grow light brands with dedicated cord and cable ecosystems for their fixture lines.
Iluminar Wieland Power Cords
Iluminar uses Wieland GST18 connectors on their DE HPS, CMH, and LED fixtures -- a commercial-grade locking power connector system that provides secure, tool-free connections in multi-fixture commercial installations. Wieland main-line AC extension cables (available in 15-foot lengths) are used when panels are not immediately adjacent to fixture locations. Voltage-specific cords in 120V (NEMA 5-15) and 240V (NEMA 6-15) are available; confirm your panel voltage before ordering Iluminar cords. The Cable Logic secondary and main-line cables (120-480V) support Iluminar's scalable daisy-chain distribution system for commercial rooms.
Standard Replacement and DIY Cords
Grow1 offers both pre-made replacement power cords and DIY electric cord sets for custom wiring projects -- 16-gauge 120V DIY cords in 8-foot length are practical for building custom extension or fixture cords for non-Wieland fixtures. ThinkGrow and PHOTOBIO daisy chain control cables allow multi-fixture dimming coordination through a single controller connection. Browse all grow lights or see extension cords and power strips for grow room electrical accessories. Fast shipping.
Grow Light Cords FAQ
What type of power cord does my grow light need?
Power cord requirements depend on fixture wattage and the connector type used by your specific fixture brand. Most HPS and CMH ballasts use standard NEMA 5-15 (120V, 15A) or NEMA 6-15 (240V, 15A) plugs -- standard outlet configurations. Commercial LED fixtures from brands like Iluminar, PHOTOBIO, and Gavita use brand-specific connectors (Wieland, Souriau, or proprietary) that require brand-matched cords. Check your fixture manual or existing cord for connector type before ordering a replacement. For fixtures above 1,000W, verify that the cord gauge matches the amperage draw -- a 1,000W 240V fixture draws approximately 4.2A, manageable on a 14-gauge cord, but a 2,000W fixture at 240V draws 8.4A and needs 12-gauge minimum.
What is a Wieland connector and why is it used on commercial grow lights?
Wieland GST18 is a standardized locking power connector system widely used in commercial LED grow light installations. The connector provides a secure, push-twist-lock connection that prevents accidental disconnection in environments with vibration and physical activity, rated for 20A at 250V. Unlike standard NEMA plugs that pull straight out, Wieland connectors require a deliberate twist to disconnect -- reducing the risk of accidental unplugging during room maintenance. Wieland is used in daisy-chain power distribution systems where multiple fixtures connect in sequence from a single power run, simplifying installation wiring in large commercial rooms. Iluminar, and some other commercial LED brands, have standardized on Wieland for their fixture connector systems.
Can I use an extension cord with my grow light?
Yes, but cord gauge must match the fixture load. For fixtures up to 15A at 120V (1,800W equivalent), a 14-gauge extension cord up to 25 feet is appropriate. For 20A loads or runs over 25 feet, use 12-gauge. For 240V fixtures, use only 240V-rated extension cords with matching plug and outlet configurations -- never use a 120V extension cord with a 240V fixture. Avoid daisy-chaining extension cords (connecting one extension cord to another) -- this effectively increases resistance and can cause voltage drop that affects fixture performance. See our extension cords and power strips collection for grow room-rated options.
