40ð for two weeks

Any thoughts on the best way to simulate 40 degrees for a big plant in a net pot?

a freezer with a flourescent wired into it?

What is everyone doing out there with hydroponic strawberry plants after they've produced fruit? Do you simulate winter in any way? I know the runners need to be refrigerated after they have rooted well, but what about the mother plant that still has a couple seasons left? Does it somehow need a dormancy period simulated? And how?

Most strawberry crops are simply killed off at the end of the season (assuming you are growing a June bearing variety)and new plugs are started the next season.
If you want to "overwinter" them, when the weather turns cool, they will go dormant until it warms up. In hydro, simply get the temperature down so they'll go dormant then keep them cold until you're ready to grow them again.