10K 315W Single Ended CMH Bulb

The Grower’s Choice 10,000 K 315 W is a precision-designed ceramic metal halide lamp engineered as a finishing light for the final 7-14 days of flowering. Its high color temperature and strong UV-B spectral peaks stimulate a natural stress response in plants, resulting in enhanced resin and trichome production which are qualities prized for potency and aromatic depth. This lamp delivers approximately 450 µmol/s of photon flux and emits around 22,000 lumens at 100 hours of use—yielding an efficiency of about 70 lumens per watt alongside a robust CRI of ≥90. Encased in a durable quartz arc tube, it is rated for 6,000 operational hours with spectral stability, and remains effective beyond 25 flowering cycles before reaching end-of-life. 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.