Well, it looked like it was in the sky. The light seemed to be high above the ground viewed from this plane taking off from the Da Nang Airport in Vietnam. But it looks like it was actually a theme park on top of a mountain.
https://www.google.com/maps/place/B...try=ttu&g_ep=EgoyMDI1MDYwNC4wIKXMDSoASAFQAw==