Odd shadows

 The shadows above perplexed me, appearing to give me a halo. Then it occurred to me that what seemed like a halogen spotlight in the ceiling above was probably an LED replacement version, Sure enough, by using my fingers in a strobing pattern, I was able to see 3 white LEDs. The photo I took below somehow comes up with a ghosted image of them. The dark part of the shadow must be where my head was blocking out light from all 3 LEDs. The halo will be shadow caused by just 1.