It would be possible for lights to be Re-Switched-On with just the press of the PTT, after the first 'coded' switch-on. I think anyone with a Phd in electronics could configure a PIC Chip to do the neccesary functions.
One objection to night flying is that it could lead to no revenue for the airfield, if the office is closed, and also neighbours objecting to multiple free circuit sessions in the dead of the night.
Pete