Wintering Cymbidiums and what the heck is this?

[Nlamr]

I have a plan b, a window sill that gets cool, but not nearly as cool as this so if I have to I can move them for a few weeks, but it is good to know they can survive 20s, I don't think it will go much lower than that for very long, and on super cold nights they may just have to deal with being in the mid to low 60s. I have also been making sure they don't touch the glass... I have had some get frostbite before from touching the window