Yes.
Fermenting your feed is no different than waiting for bread to rise. Its time and temperature dependent. Cooler temps mean longer ferments. Moisture level has essentially nothing to do with it - your ferment isn't going to skin over and dry out like proofing dough.
Moving to the pantry will help control errant breezes, and help insulate against the addition of random unwanteds. Assuming your pantry is a good, clean, germ free space its the prefered location - though you may wish to put down a sheet pan, aluminum tray, etc to set your jars on in case one ever ferments over the top.
Sunlight, LEDs, Incandescents, light level at all are completely irrelevant.
/edit and if all your ferments stopped (as opposed to simply slowing), think back on what you've done over the last few days. If you are using a municipal water source, is there any reason they may have increased the chlorine levels in your water? Did you bleach your jars after last wash, and maybe not rinsed them as well as you thought? Someone sprinkle some OxyClean or "Barman's Friend" in your ferment jars?? Or simply excess salt.
Even so, they can probably be saved by introducing some fortified bread yeast slurry, giving a good stir, and showing some patience.