The Libra 2 happens to supports "Eclipse" waveforms (e.g., dedicated white-on-black ones), which is admittedly what makes nightmode bearable to begin with

.
On older devices without those, the flash can appear to stagger or double, which looks *hilariously* bad

. (This is somewhat tied to the GC behavior, but then again, you kinda need a GC to flash in the first place, and nightmode ghosts like crazy without GC on those devices, so it's a neat catch-22 ;p).
EDIT: Or not. Flashing GL16 sucks, too.