In short
- Features a serpent representing the god Harsomtus inside a lotus flower.
- Located in the underground crypts of the main Hathor Temple.
- Access requires navigating steep, narrow, and poorly ventilated stairs.
In this article
Many visitors look for the Dendera Temple crypts light bulb carving. Fringe theories claim it shows ancient electricity. In reality, Egyptologists identify the image as a mythological representation of the god Harsomtus emerging from a lotus flower.
What is the Dendera light bulb?
It is a low relief carving showing a serpent emerging from a lotus flower, symbolizing creation.
Fringe theorists argue the carving resembles a modern light bulb. However, Egyptologists confirm it depicts the god Harsomtus in the form of a snake. The bulb shape represents a lotus flower or protective womb.
Where is the light bulb carving located?
You will find the relief inside the subterranean crypts of the main Temple of Hathor.
The Dendera Temple Complex contains 12 underground crypts. Priests originally used these secret chambers to store sacred relics, golden statues, and divine emblems. Today, you can climb down into select open crypts to view the intricate low reliefs.
Can you go inside the crypts at Dendera?
Yes, visitors can access the crypts, but the entry is physically demanding.
The stairs leading down into the crypts are steep and narrow. The underground spaces lack ventilation and feel cramped. Visitors prone to claustrophobia should proceed with caution. A small flashlight or phone light helps navigate the darker areas.
How long does it take to see the crypts?
Plan to spend 15 to 20 minutes exploring the underground chambers.
This timeframe allows you to carefully navigate the stairs and examine the light bulb carvings. The crypts are just one part of the main temple. You can fit this into your visit alongside the Great Hypostyle Hall.
Do you need an extra ticket for the crypts?
No, the standard entrance fee covers access to the open crypts.
Foreign adults pay 300 EGP for the standard entry ticket as of 2026. This ticket grants access to the main Temple of Hathor, including the crypts. Always follow current instructions from site guards regarding open areas.
Are there rules for photographing the light bulb?
You can take photos, but you must not use a flash.
Flash photography is strictly prohibited inside the temple to protect ancient pigments. You also must not touch the carved reliefs or stone walls while inside the narrow crypts. Commercial photography requires a separate permit and fee.
Questions travellers ask
What gods were worshipped at Dendera?
The main deity was Hathor, the goddess of love, music, and healing. The site also features chapels dedicated to the death and resurrection of Osiris.
How old is the Dendera Temple?
The main Temple of Hathor was built between 54 BCE and the 1st century CE. Original religious structures on the site date back to 2250 BCE during the reign of Pepi I.
Who built the Temple of Hathor at Dendera?
The primary construction of the current Hathor temple occurred during the Ptolemaic and Roman periods.
