The Grower’s Choice 3K 315W CMH is a single-ended ceramic metal halide lamp optimized for both vegetative and flowering stages, with a design focus on bloom performance. Emitting a warm 3,100 K full-phase spectrum, it provides a balanced light output enhanced by modest blue, abundant red, far-red, and UV peaks, thus creating an environment that closely resembles natural sunlight while specifically encouraging resin production and tight internodal spacing. Featuring a high Color Rendering Index of around 90, this lamp supports vibrant growth and healthy plant development. It delivers roughly 565–570 µmol/s of photon flux and produces about 37,000 lumens at 100 hours in, achieving approximately 120 lm/W efficiency. But if this lighting system is too powerful for your grow space, then take a look at the ROI-E420 system, or the smaller 10K 1000W SE for better light management.
