So, I used a Dialog insted of a Lightboxnano.
imageList.on(".dgrid-content .iconlink:click", function (evt) {
evt.preventDefault();
var data = dojo.getAttr(this, "href");
var picdial = new Dialog({
title: "Pic: " + data.substr(15),
content: '<img src="' + data + '">'
});
picdial.show();
});