Go for it! I keep my plants under fluoros at night, and at daybreak, take them outside for the day. I bring them in at dusk. Because it's getting VERY hot here now (Mojave Desert), I have to them under shadecloth in the afternoon so they don't burn up. But morning sun is fabulous. I also have to check the soil moisture quite often, and water as needed. During the afternoon, when it's really hot and the plants are under shadecloth, I spritz them every hour with water.
One problem with potted plants outside in the sun is that the soil can get extremely hot and kill the roots. To prevent this, and still utilize the natural sunlight, cover your pots with layers of newspaper, and then lay newspaper strips over the top of the soil. Spritz newspapers to keep them moist and this will work well to keep the roots cool enough to survive.
Also check for bugs regularly before bringing plants back inside for the night. I have aphids from all the roses I grow, so I buy a carton of Ladybugs from the nursery every couple of weeks and let them go on the plants. I let them on the plants at night, during the 6 hour dark period.
Good luck with your indoor-outdoor grow! You'll veg 'em fast this way.