I guess it depends on the size of the portlight, how strong it is built, whether you are concerned it might warp and leak, whether you are concerned you might be caught in a storm, your tolerance to risk, how much you like living, willingness to spend money on strong frames to avoid leaks and stay alive, or prefer a cheap solution, whether you are prepared to do work to make a portlight fit the existing cutout or prefer to get them custom made to fit, etc. There was some discussion earlier:

www.seabreeze.com.au/forums/Sailing/General/Opening-ports

I'd be getting a shipwrights opinion and advice.
Btw nice looking boat.

Looks to me like they have a join line in the frame. They may be the standard range which are not Area 1 (Hull) certified. The Lewmar Atlantic port lights that are are hull rated generally have no line in the frame and better hinges, clasps, than the standard port light range.

twodogs1969 said..
I'd be getting a shipwrights opinion and advice.
Btw nice looking boat.

Yeah i've been complemented on her sexy lines quite a few times, she's an endurance 35 but made in aus