If you want to create a more pleasant atmosphere in your living room and you don't have the budget to control it, this is the solution. voltage regulator circuit based on a triac. For very little money, and even using recycled materials, you can build your own dimmer switch. This way you can raise or lower the light in a room according to your needs at any given moment. You can use it for a table lamp as well as for one of your ceiling lights, as long as it is for normal or energy saving bulbs (not for LEDs or fluorescent bulbs).