A quick extra video to show you how I converted my Travor TL-160S studio lights (which are battery-only, i.e. they have no mains adapter socket) to run off a mains adapter for under £20 (including the mains adapter!)
I'm using an NP-F550/F570 battery, so the relevance of this advice will depend on whether you are able to source the dummy battery you need for your specific device. Having said that, this particular model of battery is commonplace in studio lighting of similar types, and other equipment.
All products featured and discussed are items I've purchased myself, and are not items I've been sent for review, nor have I been asked by any of the manufacturers or sellers to review or endorse any of these items.