At night when the plants don't work

Philip Kramer in Koboldt's book has pointed out that wherever and whenever a habitat loses sufficient daylight, any plants shall, then, quit taking in water and carbon dioxide... and start putting it back out, like we animals do. That riddle “what do they breathe at night” has meaning for plants! ... as a joke, its setup is usually broken.

In the Venus flotilla, for drifters, I have proposed a night of [UPDATE 5/6] two Earth days. In the cloud-layer over Ishtar, plain physics imposes two days of night .

In space the Sun is right out there. Such holds in Venus' orbit especially if offset from occultation. We might even raise plants in near-permanent daylight over the Venus clouds [7/26/2020 poles, 8/17 stations]. Such plants never lose daylight.

Drifting vessels could keep plants working by artificial lamps. But for the flotilla, drifting planes' first priority for the energy they have stored is the turbine.

The perma-planes will deem best to scrub the CO₂ and to keep the water. Over Venus, to remove that stuff, "activated carbon" seems like the ticket (or maybe fluorine?). We can un-scrub the scrubbers in four more days when the sun and the rest of the flotilla come into view.