I have a power strip with an LED, as well as humidity and temperature meters with always-on LED displays in my tent and I have never had issues with their presence. I would think that one small power indicator light should not be enough light to affect the plants unless it is really close to one, plants can handle moonlight light levels without reverting or herming. As you have already put a piece of tape over it I would not be too worried about the minimal residual glow.
check your day & night calendar once you drop below 15hrs of daylight some strains pop just under 15hrs and some closer to 14hrs and a lot in between. Peace. https://sunrise-sunset.org/
il have to look closer I do see lots of white pistils at each potential cola with no sacks at all… maybe a little confusion i did FIM this lots and lots