Methods to lower temps for Phal blooming?

[MojoShoujo]

I know that along with proper long term care and making sure they have enough energy after their last blooming period, a major part of getting a Phal to rebloom is lowering the temperature to the low 60's F (mid teens C) at night. Unfortunately I don't have any outdoor areas available to me to take advantage of natural temperatures (ah, the joys of apartment dwelling) so what methods would you suggest for getting the right temperature dips? Most sources just list the ideal temperatures without how to get them, or assume you have a greenhouse.
From my own research I've seen that putting a plant directly under a cool air vent is a bad plan because the air is way too dry and severe. It's also not practical to cool my whole apartment to that level.
I've seen a video that has an interesting idea: They put a layer of ice cubes in a shallow tray, then place the orchid on a pedestal a few inches above it so that the ice cools the air around the plant. (