[parkher]

My clip-on light is Ozeri Kandle Flex. I also have Ozeri Kandle 2, but I prefer Flex.
Besides, I am using that light very rarely.
If I were using it more frequently and/or if I were a woman with a purse which is larger than a pocket, I might prefer the Sony cover light.

As to Aura - CR Solves the main issue, the same as on T2 - you no longer need to use their way of handling books (with shelves / collections).
No need for shelves, no need for Calibre.
No need to wait while the device is indexing books.
Because Cool Reader has its own integrated file browser and its own list of recent books.
So you can use your own nested folder structure for books - which is so much better.
I know, shelves may include the same book multiple times in various collections, an advantage, but disadvantages are huge. The main disadvantage - shelves are not nested.
Also, no longer those annoying Kobo issues (mainly already fixed by Metazoa, though).

So, Cool Reader allows me to use my ownt folder structure, and it allows to switch on/off the internal indexing of books and internal fonts, so I can see instantly which way is better for a particular book.

Plus, on T1/T2 I have many more and better dictionaries with CR than with the Sony reader. But on Aura, CR has no dictionaries so far.

Aura is useful if you don't want to read in landscape orientation but you still want to have comfortable margins and an appropriate text width between them (as in printed books, assuming you are using a font of a similar size).
With T1/T2 I prefer landscape.