I do recognize the value of a good night's sleep for folks I work with.  It is important in keeping a clear head when chaos is running everywhere around you.  Chaos is normal in a startup.  Being able to handle it is critical.

 

Sleep helps people handle the unexpected.

 

At a time when the company is young, and one bad decision can sink everything you've worked on.  Why let something as simple as fatigue destroy your efforts?