I appear to have boxed up the cable and adapter that I use on my server PSU that I use to power many things in the garage (1400w dell thing I got cheap from a place that sold stuff for bitcoin mining) - now that the garage is going back together I would like to get my lights working again.

Its not a standard IEC cable as the PSUs are rated to 277v. Otherwise I have to start digging thru boxes which is a needless distraction in sorting out the workshop area.