The Grower’s Choice ROI‑E420 is a high-performance, compact LED grow light designed to maximize efficiency in 4×4 ft and 3.5×3.5 ft grow tents. Drawing just 420 W from the wall while producing a robust 1,090 µmol/s of PPF, it achieves an excellent efficacy rating of approximately 2.6 µmol/J, offering potential energy savings around 40 percent compared to traditional HID systems and reducing cooling requirements by a similar margin. Equipped with the Grower’s Choice “GC‑3K Full Phase” spectrum, this fixture delivers a well-balanced mix of blues, whites, and deep reds (660 nm) that support all growth stages. But if this lighting system is too powerful for your grow space, then take a look at the 10K 315W system, or the smaller 10K 1000W SE for better light management.
