CMH (ceramic metal halide) grow lights are popular due to their efficiency over traditional HPS/MH in light output per watt and their fuller spectrum of light that increases the growth, overall health, and yield. CMH lamps have a higher color rendering index (CRI) that more closely mimics the spectrum of the sun.

  • + Higher UV output means plants produce more essential oils
  • + Lasts 18 months compared to 9 month HPS/MH lamps
  • + The best light for plant growing competitions
  • - Light spectrum isn’t as precise as LED however penetration is better
  • - CMH fixtures do not come with air cooling flanges on them, so you cannot directly cool the fixture