Thank you for your replys Mike, Paul.
Mike, unfortunately I couldn't find that MOSFET locally and I purchased a different one to try out RFP50N06. I want to use an ESP8266, so this one is 3.3v, from the ones I could find locally I looked for the Gate voltage treshold, this one is min 2v , max 4v .. I though it should be ok.
I didn't about the other way you say, to use another on the gate , to boost the voltage.
Paul, the led strip is this one with the wattmeter on the AC - DC source , I get 70w when powering both led strips (2x5m). The AC - DC power source is max 100w @ 12v