The three lower cylinders have three light bulbs and their intensity can be changed by pulling or pushing the three upper cylinders. Them three can work independently depending on the needs.
The idea was born from a pesonal need, because I share my bedroom with my sister and in many ocassions it is very discomfortable the light on in the night, for example when I'm sleeping, or in other ocassions it is discomfortable for her the light on when I'm studying late at night,
Step 1: Materials
metal rod 4 mm
3 lineal potenciometers 100K
3 halogen light bulbs with color filters110V 50W
3 plastic sockets
3 transistors BT138 600E
4 meters of double wire
Step 2: How to Do It
Step 3: How It Functions
In the lamp, the potenciometers are placed inside the three lower cylinders and the potenciometer's stick is stuck with the internal cylinder of each of them. When you move the cylinders up and down the light intensity will change depending on how much light is wanted or needed.