Running LED strip lights
Typical 5050 LEDs are rated at 0.24 Watts per LED. 

At 60 LEDs per metre, your 5 metre strip has 300 LEDs requiring at least 300 x 0.24 = 72 Watts.

At 12 Volts, a 72 Watt load draws 72 / 12 = 6 Amps.

I would obtain a 12 Volt power supply that is rated for at least 100 Watts (8 or 9 amps).