7 hours and a half. I fall asleep quickly and it feels good. I hate stay up. every time I do it, no matter how late I get up the next day, I feel tired 
If it’s a winter time then yes in morning are always lazy, good thing you get sleep fast and getting sufficient sleep for your body to rest and have peace of mind for next day to start fresh. So keep it up and ensure you do not break this chain by waking too late in nights as it can disturb your sleep and next day is totally wasted due to headache etc.