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¡¡¡¡Figure 1£º Typical HBLED replacement for popular halogen and incandescent lamps

¡¡¡¡LED retrofit lamp solutions

¡¡¡¡Halogen and incandescent lamps£¬ although popular£¬ present some key concerns in today¡¯s power conscious£¬ green world. The lamps consume a lot of power and typically burn out after a few thousand hours of use. The latest high-brightness LEDs £¨HBLEDs£© offer a great alternative ¡ª they use a lot less power and can last about ten times as long. However£¬ designing HBLED replacements for popular halogen and incandescent lamps such as the MR16£¬ PAR20£¬ A19 £¨Figure 1£©£¬ and others present three key design challenges£º

¡¡¡¡The retrofit lamp must fit in the same socket as the lamp it replaces£¬ which means it should have the same form factor.

¡¡¡¡The retrofit must not only manage the high amount of power dissipated by the LEDs by having proper heat sinking but operate at high temperature while maintaining high reliability and a long lifetime.

¡¡¡¡Finally£¬ retrofits must be electrically compatible with the existing lighting infrastructure £¨wiring£¬ dimmers£¬ etc.£©.