It's strong enough to hold the lights, for sure. One tent has two units hanging and the other has one 480 watt unit that's the equivalent of the two in that first tent. I reinforce my tent roofs with plastic-covered wire shelves for additional stability. I run one shelf down each side and zip-tie the whole thing together. It also gives me lots of places to hang things like extra lights or fans, or a bunch of bananas. I've been doing that since my first tent.
I put my fan and filter above the tents for space considerations, but they're large pieces, and I'm not sure this tent frame was meant to support that much weight. It's a 6" Ostberg fan with a Can 33 filter.
This tent went up easier than the previous two, IMO.