Long sleeps or just power sleeps?

For those who are curious:

http://www.livestrong.com/article/339665-power-napping-vs-sleeping/

This is a topic that im a bit curious, do you usually sleep like a full night or just a couple of hours or dar sleep?

Personally i get about 5h of sleep at night and then around 5pm i sleep for 30/40 mins depending.