I now have the knowledge and have learned from all the problems that my friends and I have had while growing over the years, this will save you time and money 100%.

John H. Berfelo

This book covers a new era of cannabis cultivation with LEDs:

• The newest lighting technologies

• Maximize yield Increase potency

• New content and updates

• Vapor Pressure Deficit

• Understand how light affects your growing journey

• For more info www.johnberfelo.com