The Grower’s Choice 10K 500 W Single‑Ended CMH Bulb is a high-efficiency finishing lamp designed for both hobbyist and commercial growers aiming to intensify harvest quality. Emitting a crisp 10,000 Kelvin spectrum enriched with UV and far-red wavelengths, this bulb stimulates the plant’s natural defense response during the last 7–14 days of flowering. This response drives increased resin and terpene production, resulting in higher potency, richer aroma, and enhanced crop quality. Delivering approximately 800 µmol/s of photon flux, this lamp is more efficient per watt than traditional metal halide or HPS bulbs when used in 500 W CMH/LEC fixtures. It boasts an impressive Color Rendering Index of up to CRI 98, ensuring accurate and vibrant light in the greenhouse or indoor grow environment. But if you want to change it up in your grow space, then check the ROI-E420 system, or the smaller 10K 600W SE lighting.
