[MetaWhirledPeas]

Casio is phasing out electroluminescent backlighting and going back to a single LED, so I would buy an F105 while you still can. I've heard it said it was to improve battery life and longevity but I've never had a problem with either one.

[kevin_thibedeau]

Before EL they were using incandescent bulbs. So they're going forward to LED.

[MetaWhirledPeas]

Ahh! So there is some improvement at least.

[homebrewer]

If they update F91W to include better backlight, then good riddance. Their newer models (like A700W) have single-LED backlight, and it's excellent (probably better than EL, but I haven't used EL in a while). The watch is very thin too, unlike EL models.

[MetaWhirledPeas]

My son has the newer LED model, and the EL looks better. The EL watch is equally thin too.