Pure white? White balance? Multi-color emitters? What the flick LoL?

Seriously, unless you would like to better explain what you aim to obtain…

I think you may have found quite enticing the uniform lighting ability of those flashlights, as most zoomies. But if you aim to shoot video with them you will at least need to modify them with high CRI emitters of some known typical CCT. I would choose 3000K, plenty of good high CRI emitters available in such temperature and it allows you to get a spot on corrected white balance by selecting incandescent/tungsten setting. Or maybe 4000K, and then use fluorescent/warm light.

There may be other zoomies worth being used, just don't get full hollow pill SK98s for the love of God.