This book covers the industrial aspects of light-emitting diodes (LEDs) for solid-state lighting (SSL). The author targets his approach primarily to industrial engineers, in order to guide them in the LED industry. The coverage is highly-applied and based on author's 32 years of experience in the LED industry and academia. The book starts by addressing the needs that new engineers encounter in an LED company, e.g., characterization, manufacturing, and applications. Later chapters introduce deeper science for more experienced engineers and academic readers. As a result, this book can benefit LED engineers throughout their career.