yes, a great idea before bottling it will help your bottles clear faster as well.
ideal temp? as cold as you can hold your beer without freezing it for as long as you can. 24 hours is okay, 72 is better. two weeks at 40 or lower would be very good.
the cold temperatures put the yeast into hibernation, they stop swimming and drop to the bottom into the trub.
in the winter I sometimes just put my fermenting buckets in the garage for a few days, works fine.