No space on tent to move LED lights

There's a way you may do that, I did in the past. I don't know the resistance of your white metal bar of the structure, but if you believe they support your led and can do. Take just one led as example : - Tie a rope, or resistant iron wire on the middle of the middle bar, next to the hag thing that holds the exhaust fan. - on your led, place to hang on each border, so the rope can pass thru it. - Place the other point of the rope on the middle of the other bar. - Pass the rope over the other bar, on the other side, in the middle. There are many ways to hold the rope in the height you want, a knot, something to help id, etc. If you want to lower the led, just take the knot, give some rope and knot again. As it pass thru the led hangs, it will always stay in the middle, by the balance of gravity. That's the only way I see. You could do that with the middle bar, as it seems to be more resistant. Any help, pm me.

Having to assume a lot here as not many details provided. You can add bars to the top or use steel cables with bucklers to keep them taunt. I would not use rope Otherwise no real idea what you are having issues

got some of them on the way they look great. can you put a support across the tent externally I.E 4x2 then one down each side floor to top bar few screws here and there going to have to mount extractor outside somehowl to get a bit of height failing that chuck the tent out use the whole room with mylar

you can gain space on the grow top and mount the air extractor and respective tube on the outside if you have the possibility, just put the filter inside the grow. the extractor inside the grow ends up emitting more heat. you can buy 2 tubes in aluminum or iron in the size of your grow at a tool and construction store, if you can get your own grow tube supports (in a growshop you can do that) buy the tubes even the exact size of your grow if you can't get your own support buy the tubes with 3 or 4 cm more and place two tubes horizontally running your grow from one end to the other, support and fit these tubes in the top irons of the grow, in all joints with a string it turns a lot and gives a knot to avoid slipping and the tubes are well fixed

Looks to me like will have to rope off on the beams.