Powering 16 meter LED strip
The adafruit one draws up to 60 mA (0.06 A) per segment, or 3600 mA = 3.6 Amps per meter. To drive 16 meters, you are talking 57.6 amps. That's a lot of power, but you can find power supplies that will provide that. 

You will need to provide the power to multiple points along the strip; at the ends, and perhaps every couple of meters along the strip.