Comment by slothtrop

But it's all relative. What's reasonable is what allows you to get a full night's sleep. I get up at 7:20 am ish, so I wind down before bed accordingly (reserving an hour) expecting to hit the sack at 11:20-11:30 pm. The scheduling of wind-down is an effective deterrent against sleep procrastination, which I find manifests itself more when I'm already sleepy. If I watch tv or game earlier, I won't be in zombie mode, and I'll avoid blue light exposure immediately before bed.