On this model and many others, the wearer can select the duration of illumination, as well -- on the GW-6900, either 1.5 or 3 seconds!It's just the time the light stays on after you press the button.
You're right, it IS an official Casio term! I found it on this Louie Vito collab page as well: Casio Enhances Its Exclusive Line of G-SHOCK Watches in Twisted MetalI remember seeing this written on the Vito stats as well, it is an official term, it even had me wondering what it was...I thought maybe after the backlight goes off it still glows slightly or something..
that's what I was thinking as well.. what Sedi wrote in the post above would come under the Selectable Illumination Duration thing.. the fact that they wrote afterglow as a different feature had me thinking its something else as well..You're right, it IS an official Casio term! I found it on this Louie Vito collab page as well: Casio Enhances Its Exclusive Line of G-SHOCK Watches in Twisted Metal
"Full auto-calendar, 12/24-hour format; button operation tone on/off; LED light (Super Illuminator) with afterglow; selectable illumination duration: 1.5 or 3.0 seconds"
The way that's written makes it sound like it's not the light itself.
Now I'm wondering too -- I know my DW-6600's glow VERY brightly for several seconds after using their very bright EL, my other G's do as well but very faintly.
when they first made the technological leap to EL, that probably made sense!The original 5000 (and shortly later, the 5600's) had an incandescent bulb that was only lit as long as the button was held down. Now the backlight latches digitally for a period; hence the term "afterglow."