If the new light is the Bestva Elite 2000 COB, it’s only drawing 400w from the wall. It could maybe flower 3x3, if that’s that case.
Knowing that, and since you’ve already started some seeds, I’d veg your photos and let the autos go under the larger of your lights. Once the autos are packing on weight, I’d clone cuttings from the photos. Maybe 4-5 per mom. By that point you might be getting an idea of the vigor of these moms. You could root the clones in 2 weeks and then start vegging them. Flip them into the flower tent once the autos finish. I’d be ruthless about what makes the cut and what doesn’t. You could perhaps keep 4 in a small space. If you try to light a larger space with the light I think you have, they will stretch. Ultimately, it’s entirely up to you, but that’s what I’d do in your shoes.
If you can drum up another $170-300 for lights, we can there are LOTS of options that will enhance your results.
Edit: the lights on amazon have duped so many of us, you’re not the first to buy an import that misrepresents the output. They still grow cannabis, as you demonstrated. They’re just nowhere near as powerful as they claim.