More... stalks, I guess, are growing up to match the height of the first. They're all parking themselves a few inches from the light. I don't know if that's coincidence. Growth looks good - some purple visible. I hope that's the purple I'm looking for and not some deficiency.
@BigDaddyK, It's all good - I'm hanging it up with this RDWC, though. I'm growing in a garage in the desert and to keep the water temp low I'll have blast the A/C. I'm buying more autopots and packing this system up until December!