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CMH grow lights are great for commercial cultivations and hobbyists with enough space. They produce bigger denser buds, and they offer a rich list of options. If you are planning for obsolescence and want the greatest yield ROI within 1-2 year time frame, choose CMH. And even if you keep your grow space past 5 years, don’t worry, CMH’s provide a greater gram per watt due to their higher PPF and canopy penetration.