I saw this approximately 2010-2012. Main character in a office building when aliens made of light attack. Style of the short series was 1960’s retro black in white but done in 2000’s. A NASA Orion era astronaut comes to the rescue, sent by I think a moon base? (not sure on that) who he has intermittent contact with. NASA astronaut comes with his gun full of bullets, apparently made of light only thing able to kill the light aliens. They have a adventure and at the end they disarm some bomb in a parking garage. Eventually they split paths. NASA is shown on Mercury? in conflict with someone else. While the man in the office gets a package with a bunch of the light bullets.
This was in English. On a ComCast on Demand channel, somewhere in some independent? sci-fi channel.
Web series called Mercury Men – http://www.mercurymen.com/
Was available through SyFy Channel On Demand for a while
Awesome, thanks a lot I had no clue how to find it again.
It’s almost a month later, but it’s finally confirmed as solved. All credit to thad barkley.