Can you add that to your recommended 8 hours of sleep? Not really. That’s according to Dr. Raj Dasgupta from USC’s Sleep Medicine division. He says the type of sleep we get when we conk out during the nightly news isn’t quality sleep that will help us wake up feeling refreshed. Its more like a nap, that only takes you to the lightest stage of sleep – not the restorative, deep sleep which clears away harmful brain proteins, improves memory and encourages the formation of new cells. So, just because you caught 20 winks on the couch, doesn’t mean you can sleep less once you go to bed for real.