My incubator

I built a seedling incubator this morning.  It's basically a "box" around my seedlings made from a panel of reflective foam insulation.

The goal is to maximize the amount of light the seeds get under the fluorescents, and to hold in as much heat as possible.  With nighttime temps getting down to 30F this time of year, I'm trying to keep the plants as warm as possible (short of setting this up in my house, of course).