I've tried placing area, point and spot lamps under the lamp shade, but I can't recreate the effect in the photo at all. All types create a soft fall off with no edges and don't project any shadows at the top of the lamp.
Nevermind, it's working now. I had already gone at it for 30 min, but I never put the light source directly on the post because I thought it would count as the light being inside the object. It was never centered, and this made every result look off. Sorry haha.