It all depends on your plants if they only get 2-3 ft then your good a little in my opinion but doable if your plants are anything over 3 the light will be way too close.
You will also need to leave some space between the top of the light and the tent. If your light has fans, probably more space. It is doable but you will end up with really short plants. So what you are looking at is: Pot height + Plant height + space below light + LED light + space above light.
I think I will err on the side of caution and revert back to its intended build. Hopefully I can pick up an extra tent on the cheap somewhere.