Temperature of PCB during Heat dissipation

[viraldani]

Hello All,

I wanted to know that ''Temperature of PCB during Heat dissipation''

(Encloser Size : X-60 X Y-15 X Z-60mm
IP class : IP66
Total Power : 18W
Ambient temperature : 25C degree and 55C degree )

Need to know Temperature rise on PCB during Ambient 25C degree and 55C degree for 18W power dissipation in PCB.

Regards,
Viral Dani