Indoor start and then move outdoor

"If I use 14/10 instead and then move outside when there will be 13hrs and 1/4 from sunrise to sunset, is it going to be ok to keep my plants in veg?" Yes. Official Sunrise to Sunset is sort of a guide line. But with 13 hours of day light you'll have 1-2 hours of low light but the plant will still interpret this as being in season and will continue Vegging. When fall comes and it swings the other way the same thing happens. Your plant will start to flower before official sunrise and sunset is 12 hours. The shortening of the days tells the plant it's time to start to flower. I live in a Colder Climate gets around -10 during November. But Iv'e never had a photo plant come up late yet. One we had to blanket at night to keep it warm but other then that it was a pretty successful harvest. Hope this helps and happy growing.