I would think economy of scale when you start producing these would get you down under 3 grand fairly quick.
Second, you can make one of the more efficient light sources we now have in your own home.
Tell me that won't shake the light bulb market to it's core.
3D printing is going to eventually (and by that I mean in the next 10 years) shake almost every industry to it’s core. It will decimate China, as well.
The End of Chinese Manufacturing and Rebirth of U.S. Industry
http://www.forbes.com/sites/singularity/2012/07/23/the-end-of-chinese-manufacturing-and-rebirth-of-u-s-industry/
Even if the Chinese automate their factories with AI-powered robots and manufacture 3D printers, it will no longer make sense to ship raw materials all the way to China to have them assembled into finished products and shipped back to the U.S. Manufacturing will once again become a local industry with products being manufactured near raw materials or markets.
So China has many reasons to worry, and manufacturing will undoubtedly return to the U.S.—if not in this decade then early in the next. But the same jobs that left the U.S. won’t come back: they won’t exist. What will the new jobs be? We can only guess. Autodesk CEO Carl Bass says that just as we have created new, higher-paying jobs in every other industrial transition, we will create a new set of industries and professions in this one. Look at the new types of jobs and multi-billion dollar businesses that the Internet and mobile industries created—these came out of nowhere and changed our lives, Bass says.