what the?

It's been very dark in the hallway for the last 5-6 days.  Pretty hard to see in here. 

I was just about to replace the bulb when I realized it had not gone out by natural causes.
There are several ways something like this could happen. 
I saw one of those ways on TV recently.

Black Hole Open for Business

This hole has begun accepting items.

The concentration of articles surrounding the hole is fairly high. Indulging in close-up view, recommended.

As you undoubtedly recall, this was once a mere crack open to liquid-only transfers.

March 30: Week of the blue light

This black lightbulb appeared inexplicably in the hallway on March 30th, casting a party-style blue light on everything in the hallway. It remained for 2 full weeks, being replaced by a standard "Soft White" bulb on April 13th.