Rating : - Landscape Lighting Made Easy As a new contractor to the landscape lighting industry I was given Advance Trade Secrets of Professional Landscape Lighting to read and found it to be informational and resourceful. Not only are the fundamentals of lighting spelled out in simple terms but so are sales and marketing. In regards to legality, article 411-2 of the National Electrical Code permits lighting systems to operate at 30 volts or less, well under the 22 volts the MultiMatic transformer mentioned in the book. Overall the book has merit and the system has credibility. Do you think inspectors (who strictly follow the NEC) would continue to permit the installation of an illegal product? No! I encourage anyone seeking to explore landscape lighting to read this book.