This photo of the one-way mesh security screen was taken during the day.
To answer the question of how much can you see inside after installing a screen like this, we can demonstrate by a short video: DEMO VIDEO;
Please note as demonstrated in this video, it is bright daylight outside, and there is significantly more lighting outside when shooting. It will give you the best oneway view when the outside is brighter than the inside. It means at night time, you won’t be able to see outside and outside can have a limited view inside due to the reverse lighting condition.