Grower's Choice ROI-FF-640 640W Full Spectrum LED Grow Light

The Grower's Choice ROI-FF-640 640W Full Spectrum LED Grow Light is a commercial bar-style fixture engineered specifically for professional flowering environments where maximum efficiency, uniform canopy coverage, and long-term reliability are essential. Built around Grower's Choice's proven 3K Full Phase spectrum, the ROI-FF-640 delivers exceptional photon output while minimizing unnecessary red loading, helping growers produce consistent, high-quality harvests.

Operating at 640 watts, the ROI-FF-640 delivers an impressive 1,920 µmol/s PPF with a fixture efficacy of 3.0 µmol/J, providing the high-intensity light levels required for commercial flowering applications while maintaining outstanding energy efficiency. Its optimized spectrum is designed to support vigorous flower development, healthy plant structure, and consistent crop quality throughout the flowering cycle.

Designed for professional cultivation facilities, the ROI-FF-640 operates across an exceptionally wide 108–480V AC input range, making it compatible with a variety of commercial electrical infrastructures. Integrated onboard dimming and external 0–10V dimming compatibility allow growers to precisely control light intensity while integrating seamlessly with commercial lighting control systems and environmental automation platforms.

Its commercial-grade multi-bar design distributes light evenly across the canopy, reducing hotspots while improving light penetration throughout the crop. The open bar configuration also promotes excellent passive cooling, allowing the fixture to operate quietly without fans while maintaining stable operating temperatures.

The ROI-FF-640 is built for demanding cultivation environments with an IP66 environmental rating, DLC and ETL certifications, and an L90 rated lifespan exceeding 54,000 hours. Its isolated driver architecture, passive thermal management, and durable commercial construction provide dependable long-term performance for professional growers operating continuously throughout the year.

Proven 3K Full Phase Spectrum

The ROI-FF-640 utilizes Grower's Choice's proven 3K Full Phase spectrum, specifically developed for commercial flowering applications.

Its balanced full-spectrum output promotes vigorous flowering, healthy plant development, and consistent crop quality without excessive red loading.

High-Efficiency Commercial Performance

Operating at 640 watts, the fixture delivers 1,920 µmol/s PPF with an industry-leading efficacy of 3.0 µmol/J.

This combination allows growers to maximize photon delivery while reducing overall electrical consumption.

Wide Commercial Voltage Compatibility

The ROI-FF-640 operates across an expansive 108V to 480V AC input range, making it suitable for virtually any commercial cultivation facility.

This flexibility simplifies installation across both new construction and retrofit projects.

Uniform Bar-Style Light Distribution

Its multi-bar fixture design distributes light evenly across the entire canopy.

Uniform photon distribution helps reduce hotspots while improving lower canopy penetration and crop consistency.

Integrated Onboard & 0–10V Dimming

The fixture features both onboard dimming controls and 0–10V external dimming compatibility.

Growers can easily adjust light intensity manually or integrate the fixture into centralized lighting control systems.

Passive Fanless Cooling

The ROI-FF-640 utilizes passive aluminum heat dissipation with no moving parts.

Fanless cooling reduces maintenance requirements, eliminates fan noise, and improves long-term reliability.

Commercial Environmental Protection

An IP66 environmental rating protects the fixture against dust and powerful water exposure, making it well suited for demanding indoor cultivation environments.

Combined with DLC and ETL certifications, the fixture is engineered for continuous commercial operation.

Built for Long-Term Production

The ROI-FF-640 carries an L90 lifespan exceeding 54,000 hours, meaning the fixture is designed to maintain at least 90% of its original light output over its rated service life.

Its isolated driver architecture and commercial-grade construction provide dependable performance for professional cultivation facilities.

What's Included

• Grower's Choice ROI-FF-640 LED Grow Light
• Integrated LED Driver
• Adjustable Hanging Hardware
• Power Cord
• Installation Guide