Dragonflies do not emit light. The insect that you are thinking of is a firefly, or the scientific name is Lampyridae, which are a class of beetles. They are nicknamed 'lightning bugs' in the US.
Light bulbs emit light.
Technetium doesn't emit light.
bulbs emit light
The Earth does not emit light, it like the moon reflects light
Some light sources can emit multiple types of light, such as white light sources that emit a combination of different colors.
Yes, light bulbs emit radiation in the form of visible light.
Light waves do not emit radiation, light waves are radiation.
the sun only emit light. not the moon. it will reflect the light of the sun.
Light bulbs emit electromagnetic radiation, specifically visible light, to produce light.
planets, moon,etc do not emit light on their own.
Light emitting diodes will emit light when electicity is passed through them.
Yes, dragonflies are attracted to light sources, especially at night. They are known to be drawn to artificial lights such as streetlights and porch lights.