I need about seven hours of sleep to function. I don't usually have a problem falling asleep. However, there have been many times in my life when I did not have enough hours in the day. The only way to find more time was to steal from my bedtime hours, but that did not help me work any better--or write any better.
Way back when I was a college student I worked at a glass factory. For two summers, I endured rotating shifts because the wages were great. However, I found it next to impossible to keep my eyes open. Mostly I stood and packed bottles into boxes, but every hour or so, I got a chance to sit down and watch the bottles twirl by the light box. I was supposed to be looking for bad bottles, but the twirling bottles quickly turned into lovely dancing ladies in long dresses as I started dreaming. I am lucky I did not fall off the stool.
I know many authors who do not get enough sleep. They get up early, write, and then put in a full day at their real job. I never did that. The thought of crawling out of bed at 4:30 a.m. to write never appealed to me. I love writing, but I like to do it with a clear head.
There are the writers who stay up late into the wee hours to write. I never did that either. I actually tried it a few times, but the next day I was not up to par.
I tend to do my best writing in the evening after supper. I don't watch television so I don't have that distraction. I have not written as many books as some authors, but I know my limitations. Not getting enough sleep will make my blood pressure go up and that is a bad idea. So I sleep when I am supposed to sleep and write when I can.
When do you write?