I think these are distant battlefield illumination flares to the NW.
The right most hotel is The Stratosphere Tower.
Red arrow – Fontainebleau.
Yellow arrow – Resorts World Las Vegas
Green Arrow – Encore
Notice that the Fontainebleau is dark. It’s not open yet.
The only way to get this view of the Fontainebleau is from the SE in the hills in the Henderson area. So we are looking to the NW. I think these flares are near Area 51.
These flares are very bright ... Read even more