4.5 hours is right on the sleep cycle, so it should have been effective.
Yes, it was too effective. Around 5am to 6am the window for a successful 8-9 hours closed. Didn't get home until 8 and had a strange 2nd wind all while feeling exhausted after being awake for 26 hours. It was weird. All in all, after the 4.5 hours I ended up having a great hang around the
house condo-thingy and chill day. *shrug*