One of the problems starting seeds in my basement is the low temperatures. This year I put together this contraption to help out.
A 60 watt bulb hooked up to a timer set to turn on /off at thirty minute intervals. I insulated it with a cut-up windshield heat deflector. I probably should have painted the old baking pan black on the bottom, but rust is close enough, besides I didn’t have any black paint and certainly wasn’t going to buy any. The rack is two fold up portable shelves I got from the dollar store, the lamp a garage sale find. The temperature approx. 1/2 inch above the pan ranges 75-80° . Four batches of early lettuce were seeded today.