Tuesday, October 30, 2012

Lighting Control and LED dimming

NEMA (national electrical manufacturers association) and several other interested lighting control  associations have been working together to have a performance standard accepted and published for solid state dimming controls. They have also been pushing for a standard SSL 6-20104 which gives guidance to LED manufacturers. These guidance standards are directly related to the dimming of LED Solid state lamps. These standards are still in the development stage as is LED technology and will require several amendments to ensure total consistency between dimming devices and LED lamps.

Interestingly current UL standards UL 14725 specify an LED lamp as an "electronic ballast"and the main concern covered in this standard is the "in-rush" current which is generated at the start up of many LED lamps. High in-rush currents have the ability to damage the lamps as well as switch contacts, this results in a hazardous electrical installation where the switch is seen to be the means of disconnect. 

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