ghost load


Resident Curmudgeon
Senior Team
Premium Member
Aug 21, 2007
Las Vegas, NV, USA
In olden times, with resistance dimmers (see Dimmer, Resistance), if the dimmer was not loaded to within 75% of its capacity, the load would not dim completely out (to black/to zero). Thus extra lights or heater coils were added to the circuit, often backstage/offstage in a corner, to make up the additional capacity.

Even today with a modern dimmer, phase control , a ghost load of 50-100W may be required to allow full dimming of a very small load, such as a string of mini Christmas lights or a 15W practical lamp or dimmable LED replacement lamps.

Do not confuse with ghost light.
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