700 Watt LED Grow Lights for 5x5 Canopy Grows
700W LED grow lights are purpose-built for the 5x5 ft flowering footprint -- the wattage class that delivers productive flowering PPFD (900-1,100+ umol/m2/s) across 25 sq ft without the thermal management challenges of higher-wattage fixtures in confined environments. At 2.8-3.0+ umol/joule efficiency, a quality 700W LED bar array produces approximately 1,960-2,100 umol/s of total photon output -- enough for dense canopy production at commercial PPFD targets across a full 5x5 footprint. The Growers Choice ROI-E720 (720W) and HLG 650R (650W) are the most widely referenced fixtures in this wattage class.
700W LED vs. 600W vs. 1000W
The 700W class sits between the 600W fixtures optimized for 4x4 coverage and the 1000W+ fixtures used for large commercial canopies. For a dedicated 5x5 tent, a single 700W bar array provides better canopy coverage than a 600W fixture (which may undershoot the 5x5 footprint edges) and avoids the excessive heat and intensity management that a 1000W fixture creates in a 5x5 space at standard hanging heights. Growers who run 4x4 tents and are upgrading to 5x5 typically step into the 650-720W range for a matched single-fixture solution. Use our PPFD & Light Coverage Calculator to confirm any specific 700W fixture covers your 5x5 canopy at your target intensity and hanging height.
Top 700W LED Brands
Qualified brands in this wattage range at Hydrobuilder include Growers Choice (ROI-E720 -- 720W, one of the most popular commercial 5x5 fixtures), HLG (650R bar array at 650W), Gavita (Pro 1700e LED at 645W), and Faven Lighting commercial bar arrays in the 650-750W class. All use Samsung LM301H or equivalent diodes with Meanwell or Inventronics drivers at 2.7-3.0+ umol/joule efficiency. Expert support available.
700W LED Grow Light FAQ
Is a 700W LED enough for a 5x5 grow tent?
Yes -- a quality 700W LED bar array at 2.8+ umol/joule is the purpose-matched size for a 5x5 ft flowering footprint. At this efficiency, 700W delivers approximately 1,960 umol/s of total output, providing 900-1,100 umol/m2/s PPFD across a 5x5 canopy at standard 18-22 inch hanging height. This is within the productive flowering range for most crops. Verify using the manufacturer's published PPFD map and our PPFD Calculator rather than relying on wattage alone.
What is the best 700W LED grow light?
The Growers Choice ROI-E720 (720W) and HLG 650R (650W) are the most frequently referenced commercial-grade options in this wattage class. The ROI-E720 is specifically designed for 5x5 ft coverage at peak flowering PPFD, and has extensive real-world documentation from commercial growers. The HLG 650R provides comparable output in a bar array format with HLG's brand reputation. The Gavita Pro 1700e LED (645W) is the third widely adopted option, particularly for operations already integrated into the Gavita EL2 controller ecosystem.
Can I use two 350W LEDs instead of one 700W fixture?
Two 350W fixtures can cover a 5x5 canopy and provide better uniformity than a single centrally mounted 700W fixture -- two lights positioned in a 2x5 or grid pattern distribute PPFD more evenly across the 5x5 footprint with a smaller center-to-edge gradient. The tradeoff is more hanging points, more power cables, and more individual fixtures to manage. Single 700W bar arrays from quality brands are designed to cover 5x5 uniformly with their multi-bar layout, making the two-fixture configuration primarily beneficial if you already own two smaller lights or want maximum uniformity above what single-fixture bar arrays provide.
How does a 700W LED compare to a 1000W HPS for a 5x5?
A 700W LED at 2.9 umol/joule produces approximately 2,030 umol/s. A 1000W DE HPS produces approximately 2,100-2,200 umol/s -- slightly more total output but at 43% more wattage. In a 5x5 footprint, both deliver adequate PPFD for flowering. The LED advantage is 43% electricity savings and significantly less heat -- in a 5x5 tent or small room, the HPS heat load requires substantially more cooling infrastructure. Over a full production cycle, the LED's electricity and cooling savings typically outweigh the higher upfront fixture cost within 1-2 years.
What ventilation do I need for a 700W LED in a 5x5 tent?
A 700W LED generates approximately 700W of heat (essentially all fixture wattage converts to heat in the growing space). In a 5x5x7 ft tent (175 cu ft), a 6-inch inline fan rated 350+ CFM at the carbon filter is the minimum for adequate air exchange and thermal management. In warmer climates or summer operation, size up to a 6-inch fan rated 400-500 CFM free air to provide headroom for peak heat events. Use our Ventilation Calculator to confirm the right fan size for your specific tent dimensions and climate conditions.
