Probably,
However . . . I don't think gloworms have capacitors, do they?
I can imagine that there are likely a number of light producing phenomena which have nothing to do with capacitors.
Then there's the phenomenon of the propulsion system producing various glows because of the gravity/ion flow aspects of the propulsion physics . . . as I marginally understand it.
Then there's the lights which evidently are literally tractor beams lifting cows up for mutilation etc. And on return, the cow being lowered by the same beam--until the beam is evidently arbitrarily switched off and the cow falls the rest of the distance . . . according to solid observer reports.
Certainly ET craft have the capacity to fly, appear, etc. without lights; without being visible in daylight etc. Supposedly that involves--depending . . .
--dimensional factors
--cloaking technologies
--???