I added a  light bar to my wife's Savage - no problem with the power.  It installs utilizing the hardware for the headlight.  

Found it on Accessory International - http://www.accessoryinternational.com/cwlightbarprices.jpg

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The screw on the post of the turn signal is taken off, the signal removed (pulling the wires out completely after disconnecting).
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Bar is solid - but you can set it up so the wires are not really seen.   Of course, I didn't notice the wires until you said something....now I have to double check them as I am noticing them more!
The only thing I didn't like about it is more the style - I thought they would be back further as most motorcycles have them ( oOo ) where the main light is out more than the smaller spot lights.

I went to a machine shop and had it made.  It's 8 inches longer than stock to allow the second stock pad to be attached.  Works okay according to the wife - helps her back but she can't lean on it all the time due to the fact that leaning back causes her to sit differently on the seat causing a problem there (and we have the gel seats installed on that bike).