Nice thing about IMF is that you can keep your "nightowl" schedule. Using the more lax version of 16/8 (8 hour feeding window), you could use a feeding window of 2pm-10pm. I had a similar schedule back when I was a night owl but the wife didn't like it much. I've since moved to 18/6 with a feeding window of 12pm-6pm. I did it mostly for weight and fitness but absolutely noticed the sleep benefits, which I initially attributed to exercise.