The Grower’s Choice 3K 315W SE CMH is a single-ended ceramic metal halide lamp engineered to offer a balanced, full-phase spectrum well-suited for all stages of growth, with special emphasis on bloom performance. Emitting a warm 3,100 K light, it delivers a blend of modest blues, abundant red, far-red, and UV wavelengths that closely emulate natural sunlight while encouraging tighter internodal spacing, increased metabolic activity, and enhanced resin production during flowering. This lamp shines with high efficiency, producing approximately 37,000 lumens at 100 hours—around 120 lumens per watt, and generating a strong photon flux of about 570 µmol/s. Engineered with a precision-gassed quartz-ceramic arc tube, the lamp maintains stable spectral output and high PAR levels throughout its life, which is rated at approximately 15,000 hours. 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.
