Hey there. I’ll try to respond as best as I can. The 16-hour cycle: In theory, 16 hours of light is enough to keep a plant in the vegetative phase. However, if the mother plant was already very mature or if it experienced stress before cloning, it may sometimes show "pre-flowers."
What you see in the photo: Looking closely at the nodes (the axils of the branches), what you see looks more like stipules (the small green spikes that are perfectly normal) or female pre-flowers (pistils) than "male bells."
The stress of cloning: Cloning is intense stress. Sometimes, the plant reacts by showing early sexual signs, but that doesn’t mean it has become "herma."
My checkpoints:
The shape of the organs: If they are small balls hanging by a little thread (like a mini banana or a bell), it’s male. If it’s a small teardrop shape with two white hairs (pistils) coming out, it’s a female that’s a bit stressed, but nothing serious.
Light pollution: Even with 16 hours of light, if you have light leaks during the 8 hours of night or if your timer is acting up, the plant can panic and "herm." 16 hours is a bit limited for some sensitive varieties; I often prefer to stick with 18 hours to ensure they stay in "growth" mode.
The origin of the cutting: If the mother plant had a genetic tendency toward hermaphroditism, the cutting will do the same under the slightest stress.
In summary: No immediate panic. At this stage, I don’t see any obvious "balls" in the photo. It’s probably just a reaction to stress or early female pre-flowers. Keep an eye on it over the next few days... I hope I could help you. Have a good evening!