Day length questions?

[Cattleya17]

Hello all!!!! its time to bring in the orchids!!!! in about 2 days the temperature at night will be too cold for my plants(mid to low 40's) its sad!!!!

I have trouble with how early for the timer to turn the lights on and how long to have them stay on? What day lengths are you guys using? i want my lights to reflect nature to follow the day lengths of fall then winter then spring..... Is that wise? what is the recommended procedure?

i dont want to confuse the plants! the Species types are starting to wind down for fall and winter, and the ones that bloom in fall/winter are setting up for their bloom(Sesquipedale leonis), so i also dont want to interrupt that either!!!

Can you help me with this