This week has been a little warmer - especially at night.
Overnight, they've been going under the light. During the day, sitting out the front in the sunshine.
Switching the light seems to have helped, although this guy is still the least developed of the bunch.
I think it's the temperature, as well as having such a low power light during the first week.
Either way - the plant is looking healthy and seems to be developing better than it would outside.