10:30pm to 7:00am for me.
Interestingly though, I might sleep a bit less when on holidays. Being away from work seems to have more bearing on how much sleep I need than meditation.
"Do not force others, including children, by any means whatsoever, to adopt your views, whether by authority, threat, money, propaganda, or even education." - Ven. Thich Nhat Hanh
"The uprooting of identity is seen by the noble ones as pleasurable; but this contradicts what the whole world sees." (Snp 3.12)
"Having dispelled all darkness, he found delight in being alone" (Thanissaro) (Snp v.956)