This book contains all the information you need to make an intelligent decision when choosing the right lights for your cannabis grow. Like any good how-to book, this volume covers all the necessary information on growing cannabis under LED as well as using other lighting methods. There are many brands and models of different lamps for growing plants. They differ considerably in their efficiency and flexibility. This volume shows how to compare them and choose the right lamp for your purposes. It also shows how these technologies are used. This will save the beginner and advanced grower from common mistakes, in other words: If LEDs are considered, this book will save a lot of time and setbacks.From the foreword by Ed Rosenthal.