Chapter 9: Light, Lamps & Electricity

Marijuana Horticulture

Chapter 9: Light, Lamps & Electricity Marijuana Horticulture: The Indoor / Outdoor Medical Grower’s Bible

by Jorge Cervantes

Light, Spectrum, and Photoperiod

Marijuana needs light to grow. The light must have the proper spectrum and intensity to ensure rapid growth. Light is comprised of several bands of colors. […]

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