When (and if) to bring orchids in during "Winter"

[paphlovian]

Hello!

I live in Florida (south of Tampa) and am wondering when (and if) I will need to bring my orchids indoors this season from my patio. The lowest it's gotten so far this year is probably in the 60's (at night), but it CAN get down to the 30's (though, VERY briefly, if so). What's best in the Florida climate? I have limited room indoors for them, so would prefer to leave them outside but only if it will not harm them. I am wondering if yellowing of leaves could be from the climate change, though I didn't think it's gotten cold enough yet, but I might be wrong, as orchids seem to be a bit sensitive to some things!

Thanks in advance for your help!