Not sure if my Secret Jardin II can support lights + filter on top

Is it okay if my carbon filter + fan are on the ground? 48" x 48" x 80" tent

It's a COB framework + 4" VenTech. The tent says it can only old 65 lbs so I'd like to keep that 50 or under if possible.

I use a 3x3 Secret Jardin tent.
Also suspend the filter and exhaust fan from the top, along with the lights. . No issues.

Your fan filters and lights should be well under 50lbs.
The 6" ventech fan and filter I use is ~30lbs and my hid hood and ballast is ~ 25. Your 4" of the same brand is undoubtedly lighter, so unless your cob light is extremely heavy you will be fine.

I ended up getting a different tent (gorilla), and I'm much happier. Even the setup was may more sensible.