Light Clusters Passing Overhead

While sitting outside on the patio we noticed clusters of light passing us overhead.  They were in a V-Formation, like the way that birds travel.  However, the objects emit light independently.  The objects flew overhead individually as a single craft, but sometimes in pairs or even groups of three.  At one point two of these formations separated when an airplane passed it.  The objects also varied in size and the altitude at which they traveled.  Not sure what to make of it.  Upon research the lights resemble that of the “Lubbock Lights”.