The Bright Thing That Goes on When One Has an Idea

This page is the CodyCross answer for the clue below from Architectural Styles, Group 1171, Puzzle 1 (Gothic and Baroque).

Question is: The Bright Thing That Goes on When One Has an Idea

and the answer is: LIGHTBULB

Word Meaning:

LIGHT BULB — An evacuated glass bulb containing a metal filament which is heated by electrical resistance to produce light.

Definitions from Wiktionary.

The bright thing that goes on when one has an idea — CodyCross Answer | CodyCross Solutions