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Minimum psu load?

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Will a couple sets of cold cathodes be enough of a load on a switching type power supply?
I am adding some bling to my work bench and wanted to use an old power supply to power up some misc.led's and cathodes.Activating the power supply with a simple toggle switch connected to (I ASSUME?) the green and black power on connector on the 24 pin.
Any thought's on this would be appreciated!
 
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Should be, most run on a 12V line so I think it should be fine for any lesser PSU jumpered with a paper clip.
 
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only problem is with such a low load the efficiency goes down but it should run fine.
 
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