during 2nd week 1 hour of dark during the 12hr light cycle , is this a problem??

Hi , the plants are in 2nd week of flower , they were given a 1hour dark period in the 12 hour light cycle , will this stress my plants ???
thanx

maybe a little. but solar eclipses happen and the plants live muwahahah. sorry im not much help. but im sure they will live. i just wouldnt do it again if you can control it at all