FS,
My understanding is that night flight is only permitted in this country in controlled airspace.
That is a view shared by my all my previous instructors.
The IAA is very helpful, however they don't get as many queries as I'm sure the CAA get, and therefore probably aren't as up to speed as they should be. They have told me in the past about stuff that I knew was wrong, and only agreed when I showed them my source.
There ph number is +353-1-6718655/Fax +353-1-6707411
I suggest that if you contact them and they tell you that the position is the same as in the UK, that you get it in writing from them before you leave.
dp
ps. By the way Scopeland...quadrangle rules don't apply in Ireland....we use the semi-circle rules above 3,000'
There is a new bb for irish avaition at
http://www.irishaviators.com/