Lighting Issues?

I was asked if there was any lighting problems by my tutor, I don't think that over all there was an issue with lighting. One day were I had to film me leaving my house it was rather gloomy outside, so I used this as a sign that I was leaving very early in the morning. I did this by adding in a shot of the time of day. I feel like a lot of the clips at the beginning and end are rather dark, I left the beginning as it is but for the last few shots I added in a lighting effect because I felt it was rather hard to see what was happening in these shots, but I didn't want to get rid of them as I felt they were good.