Pharaoh’s Priests

Pharaoh’s (from the Exodus) priests probably would have had sons too. Their first born sons would have died too? Would the pyramid’s technology secrets for power, electricity and light have died with them? Because knowledge was probably passed from father to (firstborn?) son?

Or maybe power and light is still coming from them but it can only be seen from deep in space. Or maybe they are some kind of beacon or signal for “aliens”. And then Orion’s belt are not stars but lights (beacon/signal) from an other planet.