Lighting Overview for Conventional and LED Systems
With the recent recgonition of energy and concerns regarding energy consumption, lighting technologies have gained further attention. Lighting products use in excess of 20% of the total energy in consumed in buildings, thus more efficient technologies are needed. Monochromatic light emitting diodes (LEDs) have historically been used for indicators and produced low amounts of light and heat. The introduction of high brightness colored and white LEDs has allowed them to penetrate specialty and general illumination applications. The output of a typical commercial high brightness, 1 mm2, LED has surpassed 150 lm at 1 W. This evolution has created new lighting opportunites along with packaging and thermal challenges. This chapter will start with the discussion of conventional lighting technologies and then attention will be turned to energy efficient solid state lighting (SSL).
