This antique-ish looking thing is not what you think it is. It looks like a brass bulb but it is not.
In fact, it is a lamp made of perforated brass bulb-like ball. It is made to fit 15 or 25 watt fridge bulb. Surely it will provide great ambient light in dark room, hanging from your ceiling it will look like a sparkling ball of light.
On the other hand, I feel like it can be a good DIY for people who like to do their stuff on there own. All you got to do is find brass ball (there is nothing special in bulb shape, I think) and puncture it the way you want. Others can get it for $115. Not bad for a metallic lamp.