Terry is correct.
It's best to shoot in RAW if you will "Dark Subtract".
And as I stated in the other thread, if you will be using jpgs use Daylight WB, or set your RAW's to Daylight in post process for your time-lapse.
Also if you will be shooting in jpg then ICNR is your better option.
If you're worried about the long delay then just cut down your exposure to around 13 sec so that you end up with a shot every 30 sec or so (I assume you're shooting at a wide Focal Length).
If I'm doing time-lapse I just shoot in jpg and ICNR.
