I have had both good and bad experiences with Ikea lighting, but for now I just want to applaud one particular light. Its this:

Also known as the PS Maskros, and for more details see http://www.ikea.com/gb/en/catalog/products/80146249/.

It’s about 3′ diameter, and designed to look like the head of a dandelion. It’s a big beastie, so you do need either high ceilings or a double height space. But if you can accommodate it, you will find its more a sculpture than a light fitting. At night it casts some beautiful shadows on the walls. So really its more of a decorative fitting than an ambient light source….

It has the usual bulky Ikea ceiling fitting, but you can always change this for a more subtle version. And if you have the patience you can also change the cable to something more interesting, for example the pea green fabric lighting flex from Urban Cottage Industries looks great (http://www.urbancottageindustries.com/historic-lighting/fabric-cable/pea-green-fabric-lighting-flex-cable-round).