Synchronizing light/dark cycles while the plants are inside with the sunlight/night outside is key, I think, but I discovered that it isn't as easy to do as it sounds. Where I live, our longest daylight period is slightly more than 16 hours at the summer solstice. So, I was going to match the tent light to the daylight. But then we had a period of warm, clear weather. So, I thought it would be okay to put them outside. It wasn't. My two autos flowered way too early when the weather changed to cold and wet and stayed that way for several weeks. Nevertheless, despite their small size and only flowering at three nodes, they look healthy. I'm going to let them go to harvest, thinking I'll at least get to sample the weed. I have one more seed and plant to grow it in a tent this fall.
If I try again next year, I'll try to be more self-disciplined, and both synchronize the light better and wait till the solstice to put them out. Till then, I'll ponder whether having them on a shorter light period while inside might be better. I might also start using longer dawn/dusk simulation. That's because I'm wondering if an abrupt change may have been a shock. Their tent had a half-hour transition, whereas natural dawn and dusk are much longer.