It's been the metaphor for that sudden stroke of brilliance, ever since the incandescent bulb was invented.
Here, in this picture, (courtesy: my cousin Dr. Nikhil S Rajan and his iPhone 5) the idea metaphor becomes the 'idea'. An awesome shot of a sunset as seen through the idea bulb!
A wonderful picture where creativity and idea joins hands with their metaphor producing a whole new perspective !
My cousin surely had an awesome light bulb moment.
Kudos to him! Let more imaginative pics come by..