FLYlady principal: set a bedtime

As much as I would LOVE to go to bed at ten every single night, it is virtually impossible with my husband's schedule. When he works nights, I might not get to bed till 3 in the morning. When he works days, I might get to bed by midnight. Some nights my body just can't do it and I end up asleep by 12. Even if I could go to sleep by ten at night when he works nights, he would wake me up when he gets home. ... .. .. so you see my dilemma? I would rather stay awake longer then crash instead of being woken up to have to fight myself back to sleep later.