daikon, a Japaneese radish.
Allium cepa, the botanical name for the Onion
An onion, strictly speaking, is a 'bulb' and is a stem.
onion
Aplacophora
Cereal .
No, donuts are better but they do not emit light unfortunately. So there is an opening for the edible light bulb and the light-emitting donut.
Abalone
it is a bulb and could be eaten if hungry enough.
The onion is completely edible. The skin, though papery and edible is usually removed as is the small root at the bottom of the bulb. these two parts are less palatable and usually discarded. The bulb and leaves (green onion) are used in a large variety of ways.
Portabello!
It is the bulb, which is also the edible part.
Go to the hospital right away. Light bulbs are not edible.