Can I create an outlet from patio light but always powered on
Chances are you only have a switched hot at the light location. You'd be able to eliminate the switch and splice the the wires so the lights would always be on and then install a photocell or timer at the first light location to control them. If your electrical system is in conduit, you'd be able to add a wire from your switch to your box location that would give you an always hot. If your system is NB cable from your switch to the light box, you could replace the run with a 12/3 cable so you'd have a switched hot and an always hot. Yes, you would need waterproof boxes.