Dendera Light bulbs in the Secret Crypt - Did Ancient Egyptians have an unusual form of Light energy?

I wandered through the small sanctuaries inside Dendera Temple, and arrived at the Flame room which has an entrance in the floor to the secret crypts. I went down the steep wooden staircase, and had to virtually crawl under a small square entrance that open up into a small narrow passage that in turn opened up to long narrow chambers, the lighting seemed to glow an iridescent green, in this crypt an unusual relief shows what many people believe to be a light bulb. Some view the carvings as representing instead a typical set of symbolic images from Egyptian mythology. These depict a djed pillar and a lotus flower spawning a snake inside it, symbols of stability and fertility, respectively. 

I  have come across this unusual video that makes me wonder., Did ancient Egyptians create an unusual form of light energy ? In this short video it a scientist shows an experiment that recreates an unusual blue light - obviously it's not electricity as we no it today - but an interesting experiment 

https://www.youtube.com/watch?v=ygjCaehjIlo