5
I counted Irish parliament and Senate 160+60 = 220 members. Two of those I wasn't able to classify due to the unavailability of close-up images so the final sample size is 218. Pictures on the official website are small so I had to Google every member.
Results:
Blue 52,3%
Grey and Green 27,5%
Light mixed (small dark parts but mostly light) 8,7%
Dark mixed (mixed and heavily dark) 7,8%
Brown (or almost totally brown) 3,7%
In total there were 79,8% light eyes and 88,5% if you include mostly light mixed ones
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