Transformer to add general use gfci to 208 vac light pole?
Thinking that this is impractical but if anyone knows of a way let me know. In a parking lot the building owner wants to add a receptacle to plug in a holiday sign. The pole light has 208 line to line and pulling in extra conductors would not be worth it for this use. Is there any transformer for this application that could be used as a step down from 208 to 120? Most I have seen from looking into a bit are more for control circuits and seems the price is very high even for under 1kva. Appreciate any thoughts before I tell him it can not be done.