Is 16 hours too much light for winter growing?

[piping plover]

My indoor catts went from their approx 10 hrs daylight outdoors October to now indoors with a combined day length of 16 hours between natural daylight and my high intensity lighting. I’m glad they are going into sheath and buds but I’m concerned now that with 16 hour days they might think it’s summer as they are putting out roots like crazy and some that should be resting are rooting and swelling new growths. Just wanna be sure I’m not skipping them past winter rest period with confusing growth cycles come real spring. Any reason I should cut light to no more than 12 hours (Equator daylight)?