Grow Pros 315W CMH Grow Light delivers light closest to the spectrum of natural sunlight, making it ideal for full-cycle growing and bloom optimization. Optimized blues, reds, and UV light stimulates photosynthetic needs and increases yields and resin production. Grow Pros 315W CMH Grow Light uses up to 30% less energy and provides comparable PAR and PFF compared to traditional light sources while producing less heat. 4200K