I’d throw in an alternative way of assessing, what is actually needed. Abarr, if you do not own any of the li-ion battery flashlights, I would buy a cheap thrower first, with a known hotspot illumination (measured in candelas).
Since your camera + lens combo is pretty limiting, the first thing is to check, if your camera + lens combo worth the efforts at all. I know, that stepping up for bigger optics is not a budget friendly thing, but first, you should check, if you can make the desired illumination at all.
An Astrolux C8 is probably a fine thrower flashlight for checking your target illumination, as its hotspot is similarly bright, as some floodier lights’ (difference is they have wider beam, and more total output), and if you are lucky, you can get it around $20 from BangGood. So I won’t think you would regret buying one regardless of it is usable or not for your outlined plans (it won’t give you the ideal beam pattern, and the desired high CRI, but the hotspot intensity will be a good reference).
I can fully agree on the importance of the CRI, as everybody emphasized it, but I think, you might want to check your possibilities the way I outlined. Seeing the numbers, I am afraid, that you need either ‘ground-breaking’ illumination, and/or some more sensitive camera + lens combo ( e.g. 400mm f/4) to make usable video footages.
Other notes:
Regarding of the availability of XHP70 and XHP70.2, XHP70 is easier to get in high CRI, but I haven’t seen merchants selling XHP70.2 90+ CRI yet. (XHP70 is older, a bit less efficient, can be less overdriven, needs TIR optics or orange peel reflector, but has better color consistency across the beam)