The discs were all stored in a single cake box, sitting on a shelf near the ceiling of my room, where the chances of direct sunlight were next to none (although not entirely impossible). Frankly, I rarely even have my room LIGHT on, and my window is covered with a darkend shower on top of my white drapes, to keep as much light out as possible. I like to work under the cover of darkness
Unfortunately, my original testing was done with DVDInfoPro, which means the jitter lines don't show up at all. I would have used DVDInfoPro AGAIN this time, but getting the exact same version of the software I used before is pretty much impossible. With some discs, the difference is so significant, even the differences of software and firmware can't account for it (like with Sony 16x DVD-Rs and Prodisc 8x DVD+Rs).
I am happy to say I've recovered ANOTHER spindle of burned discs from my original BenQ DW1620 review, which I'll be doing similar testing on.
I may not be writing drive reviews, but I'm far from being dead when it comes to testing
Punch Cards -> Paper Tape -> Tape Drive -> 8" Floppy Diskette -> 5 1/4" Floppy Diskette -> 3 1/2" "Flippy" Diskette -> CD-R -> DVD±R -> BD-R
The Progression of Computer Media