Seedlings doomed to Low night RH & temps

So i have my tent all set up perfect. My beans have been kept warm in water for almost 24 hours, 1/3 of the tap roots are starting to poke.
I know they should be planted. When the lights are off my soil temp is 60-63 F.
Would you plant them all right now; or wait until tomorrow morning?
I either risk retarding growth, or drowning. (Possible death either way)
I placed a large jug of water in the tent with a submersible fish tank heater in hopes to decrease both my problems.

Plant them

Plant them and leave the lights on. You can have 24 hour lighting for seedlings and veg phase. So if it gets too cool with lights off, leave them on.

That was my consensus.Although I do like to have a small night cycle so the plants have some sort of Circadian rhythm. Ill set it to 20 hours.
Just sowed them.