Update: The one I bought had a very odd unevenness in natural light setting. Instead of green blotches, they were dark orange and orange blotches. Bottom part of screen was an odd mix of white and orange. So weird. Uneven so I exchanged it.
Now I have a good one that is evenly lit up BUT one of the LED's is projecting green instead of orange. Just that one single LED, if it wasn't for that one then it'd be perfect. Unlike the first unit, it's totally evenly distributed apart from the one crap LED.
Now I have to exchange it again because of the green blotch. If the third one is gonna be like this too then I'm returning it for good and maybe waiting until things clear up. If things ever do.
Which sucks because a) I feel bad opening and using the Kobo for like 5 minutes, but then returning it with the box untaped (wonder if they can still sell these), especially doing this 3 times.. And b) it's a super nice e-reader. I really like the feel of it and the way it looks. Both units I had- excellent regular lighting overall. Just a shame about the comfort light option.
I would tell myself to suck it up and get over it but I paid ~279$ CAD (and I'm a student so I really want an OK product for the price).. I really hope I can try getting a decent one this next try.