Want to control the intensity of the bulb depending on the ambient lighting, thus if their is ample ambient light, the bulb will dim and will save electricity.
Robin2:
But that would be an actual energy saving and would not "simulate energy saving" as indicated in the Original Post
...R
But then read Message #3 ...
Want to control the intensity of the bulb depending on the ambient lighting, thus if their is ample ambient light, the bulb will dim and will save electricity.
The OP has refined the scope of the project ...
From message #1: "simulate energy savings"
To message #2: "actually demonstrating energy saving"
Maybe, something like a ...
A Photocell Sensor to the A/D Input and PWM Output to control the brightness of the Bulb.