Here is Ken's initial report from MACNA regarding the Apex Lite:
* Apex Lite - this is an Apex with 1 PH port and no variable speed ports. It has networking, temp, PH, control (for legacy DCs and X10) and is about $100 less than the Apex. The package includes the base, display and 1 EB8 and lists for $370 (you need a PH probe in addition). Basically, an Apex without Variable speed pumps). Note: There are no other limits; you can add modules and EB8s till you run out of space to mount them!
The Neptune website mentions ORP, so the single port is probably pH/ORP selectable. It also mentions variable speed pump control under Timers, but that is probably a cut/paste error. Or maybe it means it maintains the software capability and can be used for an expansion module.
Todd