Good morning @galantra, coffees kicking in so let's discuss if you would like to be able to swing these lights out of the way for maintenance. Here's one possibility with making them able to swing side to side.
Using the hinge will give it more deflection so the addition of the cable and turnbuckle will eliminate that problem. Then the only deflection will be from the vertical legs which won't be much.
Using the hinge will give it more deflection so the addition of the cable and turnbuckle will eliminate that problem. Then the only deflection will be from the vertical legs which won't be much.