When the leaves break the surface of the soil, then turn on the light. Either 18/6, 20/4 or 24/0 light cycle...:thumbsup:...your choice.

81 degrees is OK. I use a hand spray bottle the keep the top of soil moist. No nutes first 2-3 weeks and don't keep the soil wet. I hope you added perlite to the soil?...if not...add it to the soil next transplant. Good drainage is critical. So is gentle air flow.

Good luck.