I would try doing a bright room - daylight - but not direct sunlight, and the lamp on. This is how interior decorating shots are often done - daylight and all the lights on. It tends to look bright and glittery, and if done right gives it a pro photographer look. Here's two examples, the first is pendants but gives you the general idea.
http://www.houzz.com/photos/1065692/NeMo--New-Modern--modern-entry-other-metroshttp://www.houzz.com/photos/870901/Tree-House-Kiawah-Island-modern-living-room-charlestonIf you go to www.houzz.com you'd probably instantly find a lot of photos lit this way.
You'll also want to turn off your flash, and move the lamp a little ways from the wall - at least a foot if you can, a couple might be better. I think the setup on your Cross Design main picture is probably your best setup. Just move the lamp further from the wall- maybe even move the table further from the wall. That way the wall is a little less in focus and the lamp will pop more.
You can also include photos of a darkly lit room too, as other photos can always help, but I would give this a try, if you can get it to work it will make your photos look like they came out of a magazine. :)