The parts do not look technical, at all.
There is a lotus flower, a snake and a bubble: and yes, temple walls often depict mythological narratives or scenes.
There is also a zodiac on the ceiling in the Osiris chapel of the Hathor temple; a planisphere depicting the 12 constellations of the zodiacal band and the representation of the zodiac in circular form is also unique.
However, those who see anachronistic images like light bulbs are experiencing pareidolia, in my humble opinion.
The Dendera temple complex, namely the Hathor temple where your "light bulb" can be viewed ironically has a ceiling that was until very recently covered in centuries worth of thick, black soot.
Pause for a moment and ask yourself: if electric lighting was available inside temples, why is there thick black soot on the ceilings?
Soot is evidence of a light source based on the burning of natural materials.
The recently cleaned ceiling can be seen here: no wiring or light bulbs, though.