Went out and reseeded the ones that did not come up. Checked soil temperature and it was 70 degrees. I put two seeds in each pot. If both come up I will just keep the best plant.

That light bulb is working quite well for heat source. Might decide to put an aluminum reflector above the lamp.

Reminds me back on the farm with a piston type well pump with a tank that was in an unheated area. We built a box around it and put a light bulb inside for heat. Covered the box with blankets to hold in the heat. We done something or other similar for the piping until it got in a heated area. I remember using heat tape for piping back then.