I have seen some interesting wall mounted light rails using TV mounts. Allows you to shift the lights out of the way for tank access.Looks clean! I have very high, vaulted ceilings above the tank so nearly impossible x.x my plan was to clamp on back but with a eurobrace.... it's sketchy. Now I'm diving into 8020 builds with the stand or wall behind, I'm lost haha
Easiest would be a bracket system bolted into the wall studs behind the tank. Alternate might be to bolt brackets to the stand uprights in the back that are long enough and sturdy enough not to bend with the weight of the light.
Depending on how wide the eurobrace is you could have Stoney print you some spacers that fill the space below them to provide a larger flat space for the bracket footings to hold on to.