I've noticed many lights on the ZL website are out of stock, so last week when I saw that theSC53w was back in stock, I jumped on it, and now that it's arrived, I'm really glad I did. Super small and light, absolutely perfect fit and finish, and of course that wonderful ZL UI.
This little puppy is plenty bright for 99% of my needs, and that lovely .013 lumen moonlight level is just right for my late night bathroom visits, with enough light to navigate, but not so much as to make it difficult to get back to sleep.
Of course the LED, while perfectly centered, has the usual light green/cyan tint, but that was easily corrected with a minus green filter, and the beam profile is quite nice, with a good balance of center spot and fill. The color rendering, once filtered, is still not quite as good as my HI CRI Zebra lights, but it's quite close.
All-in-all, a near perfect single AA light in my opinion, and highly recommended if and when you can find it in stock.