Now let's take a class called Lamp for something pretty simple.

Its data subjects could be:

$-$ Hue

Type of Bulb

$-$ Type of lamp shade

Additionally, its members may include:

$-$ Switch on and off

$-$ Modify the Type of Bulb

$-$ Switch out the lamp shade

$-$ Modify the hue

I selected each of these data elements and function members since they are all characteristics that contribute to what a lamp is$.$ To the best of my knowledge, EVERY light possesses these particular attributes. As a result, it will be quite simple to create another lamp by simply changing the member values.