Yes, the B22 has that zoom function and so I usually zoom it out to make the light as diffused as possible. I also have to hold the light as high as possible for some "stubborn" colours.
Focused lighting will blind you (literally) away from the imperfections.
Any LED torchlight would do, seriously. For me, it's how you use it. You can get a Scangrip Sunmatch and still be a total noob.
Just pick any decent ones you can find. And practice with the angles. Trust me, you will master it. Took some time for me to properly use my lights too.
Specs wise, I would prefer something with a high Colour Rendering Index (CRI) and slightly warmer temperatures to achieve better colour renditions.
So I would personally recommend the B22. Nitecore has some decent inspection lights as well, which I plan to get soon.
And if you want free lighting, the sun or your TNB lamp posts.

I find lampu TNB very good haha! Everytime I walk on the road I see the cars under those yellow lights, fuh the swirls very obvious.