From one of my all-nighters in Joshua Tree NP. I wanted to create a "glowing" Joshua Tree in isolation from other surrounding distractions of various boulders and hills, and this is the result. Image details below.

FujiFilm X-T2 and Fuji 16mm F/1.4
Sky = 3 tracked and stacked exposures, (F/2.8, ISO 1600, 4mins).
One base ground exposure, (F/4, ISO 3200, 4mins)
One speedlight exposure behind the tree, (F/2, ISO 800, 1/3rd sec).