DrJynx86answered grow question 5 years ago Your main issue will be any kind of light fixture, either mh, sodium, clf, led or whatever, will take 25-30cm (bare minimum) so only 70cm to grow, and you will have the exact same requirement for the growing medium, a minimum of 25-30cm for the soil or water container, so that leaves you with a minimum space for optimum growing.
My grow tents are Homebox Q60, so 60x60x120, and even 120 was really short for regular growing plants. I extended it to 180 and that's a lot better, given the sizes of the pots and leds and hanging fixtures.
Hope you're able to optimize it to maximum with your restrainments!
Happy smokes!