Using the "conduction tester" on an object it was found that the bulb begins to glow. Is that object a conductor or an insulator? Explain.

A conduction tester is a device with a bulb that determines if a specific object is a good conductor or not. 

where,

conductors are materials that allow electricity to flow through them; insulators, on the other hand, are materials that do not conduct electricity.

Here, it is given that the tester bulb is glowing when it is in contact with the object. This means there is a current flow within the object.

Thus, we can conclude that the given object is a conductor.