The smaller beardeds - miniature and standard dwarfs - can increase and bloom well with less than full sun, but the taller medians and talls will not perform their best unless planted in full sun. In fact, they may refuse to bloom at all if they're not given adequate sunlight, and they'll be more prone to bacterial and fungal infections in shadier beds that retain more moisture.

Laurie

The Info from the Iris FAQ says, "an area providing at least 6 hrs of direct sunlight a day. "
I think the more sun the better though. You could try them and see how they do where you have in mind, but it may 2-3 seasons to determine if they are going to do well.

How do I dig, divide, and transplant bearded irises?

Sue