Can someone suggest a biphasic sleep schedule?
 

If you have tried this, can you post your regular sleep times please.

thanks.

I suggest you take a look at the "Health & fitness" threads her":http://www.stevepavlina.com/forums/health-fitness/.

Many people are discussing sleep patterns there.

I've got quite a bit of information on my site, but to answer your immediate question, I use a 1.5/4.5 hour split. The 90 minute nap (in my case) begins at around 7:30pm, and the core sleep begins around 2am.