You will need a POE splitter. That illuminator is rated for 12vdc @ 8w.
Standard POE power is rated at 44-55vdc, most POE splittlers breakout this power - feeding 12vdc to the 'power lead' and keep the 44vdc on the 'RJ45 lead' of the adapter.
Just keep the max watts within the POE req's.
There...