Hi!

Im not sure why you would be sleepy during the day? If you successfully have a lucid dream you are still technically asleep, and if you just fall asleep normally you are still sleeping. If you find yourself up for awhile at night trying to achieve lucidity I would recommend just fall asleep and hope for a DILD.

Personally, I have been trying every night for about the past 5 nights and am never tired the next day. But of course im on summer break also