Purpose of Lighting Control:-
1. To turn ON or OFF the lamps
2. For dimming: The dimming control permits the adjustment of lighting over a range.
3. For changing the lighting levels according to need or desired of the owner.
4. For energy saving.
5. To increase the life of lighting source.
6. To increase the safety of lighting system.
7. In some types of industrial or automation, there is need of lighting control.
8. To provide proper lux level on working plane, the lighting control is required.
9. To fulfillment light intensity as per Indian or international standard
10. To control the brightness of T.V monitor, there is need of lighting control
Types of Dimmer :
1) Dimmer by using changing resistance (Rheostatic)
2) By using auto transformer
3) By salt water method
4) By two winding transformer tap changing method
5) Thyristor or SCR operated dimmer
6) Triac operated Dimmer
7) PWM (Pulse width modulation) Controlled technique.