quote:
Originally posted by Kristoff Olafsson:
Lucid dreaming happens in REM sleep which only reaches usefull duration AFTER 4-5 hours. REM periods last especially long in the morning hours...
K.Olafsson
Actually, the naps in polyphasic sleep are pure REM, once you get adjusted to the schedual. You will probably have a way higher success rate with lucid dreaming and dream recall--24 minutes or so of pure dream sleep 
