That's not quite the range of the Phantom 3 Professional, which managed 2,500 feet without issue, but it's better than the 1,000 feet I got with the Phantom 3 Standard in open space and the 400 feet it managed in suburbia.
Medical specialists with a public voice like Dr. Oz should absolutely be encouraging people who are sleepy to sleep more. However, arbitrarily applying eight hours to everyone is actually harming people who simply need less sleep, or those who actually need more than eight hours.
It is a 2 week self-experiment. 1. Guess how much sleep would be adequate-for most adults it would be 8 hours. 2. For a week (7 full days), set your alarm clock for the same time each day.3. Go to bed at an hour that would let you get the number of hours you think you need. 4. Record when you go to bed and when you wake up. 5.ow Much Sleep You Are Supposed to Get. As long as you are not tired, you are getting enough sleep! If you are tired, you may not be getting enough sleep! You might be suffering from sleep deprivation! That's the short answer.