Controller and method for a lighting system

1. A controller for a lighting system that is controllable by at least a first user and a second user, different from the first user, the controller being configured to:

detect adjustment of a setting of the lighting system by a first user across a first dimming and/or color range; and

control the adjustability of the lighting system by a second user as a function of the adjustment of the setting of the lighting system by the first user, such that the second user can set a setting across a second dimming and/or color range, smaller than the first dimming and/or color range;

wherein the controller is configured to control the adjustability of the lighting system by the second user such that the adjustability of the lighting system by the second user is dependent on a time when the first user adjusted the setting of the light system.

2. A controller according to claim 1 , wherein the setting of the lighting system by the first user is adjustable in steps of a first size, and wherein the controller is configured to control the adjustability of the lighting system by the second user such that the second user is able to adjust the setting by steps of a second size that is different from the first size.

3. A controller according to claim 1 , wherein the setting of the lighting system by the second user is adjustable in steps, and wherein the controller is configured to control the adjustability of the lighting system by the second user such that the second user is able to adjust the setting by steps that decrease in size as the current setting of the lighting system moves further from the setting of the lighting system that was set by the first user.

4. A controller according to claim 1 , wherein the setting of the lighting system is controllable across a range of values, the adjustment of the setting by the first user is to put the setting at a value within the range of values, and wherein the controller is configured to control the adjustability of the lighting system by the second user such that second user is able to adjust the setting by an amount that is dependent on the value for the setting that is set by the first user.

5. A controller according to claim 1 , wherein the controller is configured to control the adjustability of the lighting system by the second user such that the adjustability of the lighting system by the second user, from the time when the first user adjusted the setting of the light system, increases over time.

6. A controller according to claim 1 , wherein the controller is configured to control the adjustability of the lighting system by the second user such that the adjustability of the lighting system by the second user is dependent on the input device used by the second user to adjust a setting of the lighting system.

7. A controller according to claim 1 , wherein the controller is configured to control the adjustability of the lighting system by the second user according to a priority given to the second user compared to a priority given to the first user.

8. A method of controlling a lighting system, wherein the lighting system is controllable by at least a first user and a second user, different from the first user, the method comprising:

detecting, via a controller of the lighting system, adjustment of a setting of the lighting system by a first user across a first dimming and/or color range; and

controlling, via the controller, the adjustability of the lighting system by a second user as a function of the adjustment of the setting of the lighting system by the first user, such that the second user can set a setting across a second dimming and/or color range, smaller than the first dimming and/or color range;

wherein the controller is configured to control the adjustability of the lighting system by the second user such that the adjustability of the lighting system by the second user is dependent on a time when the first user adjusted the setting of the light system.

9. A method according to claim 8 , wherein the setting of the lighting system by the first user is adjustable in steps of a first size, and wherein the controlling the adjustability of the lighting system by the second user results in the second user being able to adjust the setting by steps of a second size that is different from the first size.

10. A method according to claim 8 , wherein the setting of the lighting system by the second user is adjustable in steps, and wherein the controlling the adjustability of the lighting system by the second user results in the second user being able to adjust the setting by steps that decrease in size as the current setting of the lighting system moves further from the setting of the lighting system that was set by the first user.

11. A method according to claim 8 , wherein the setting of the lighting system is controllable across a range of values, the adjustment of the setting by the first user is to put the setting at a value within the range of values, and wherein the controlling the adjustability of the lighting system by the second user results in the second user being able to adjust the setting by an amount that is dependent on the value for the setting that is set by the first user.

12. A method according to claim 8 , wherein the controlling the adjustability of the lighting system by the second user, from the time when the first user adjusted the setting of the light system, increases over time.

13. A method according to claim 8 , wherein the controlling the adjustability of the lighting system by the second user is dependent on the input device used by the second user to adjust a setting of the lighting system.

14. A method according to claim 8 , wherein the controlling the adjustability of the lighting system by the second user is dependent on a priority given to the second user compared to a priority given to the first user.