Forced Flowering

My Critical Neville Haze Auto germinated 2/21 and on 3/28 they had not started flowering. I switched the light cycle from 20/4 to 12/12 to force flowering. All but 2 have began to flower. My question is what are the risks if any, of switching them back to a 20/4 light cycle after they all start flowering?

put it in 24 hour light now for best results and little risk

I would say, if you had to flip the lights for flowering. Then you dont have autos.