Ciujbauanswered grow question 4 years ago TS1000 is a good option too , you'll have a bit less light on sides , but depends on how low you can go with lights and LST to even surface
after a long time reading a lot of stuffs on lights and growing , TS1000 is perfect for 70x70 tent , but on their website says up to 80x80 . just a bit less PAR .
If it's your first grow , go for a TS1000 , that's what i did . price is considerably more on TS2000 , maybe when you upgrade to 1m per 1m tent , that's a good TS2000 surface
Hope it helps