A method of operating an environmental control system, - said environmental control system including -- at least one processor, -- at least one nontransitory processor-readable medium, which is communicatively coupled to the at least one processor and which stores at least one of executable instructions or data for the at least one processor, and -- a plurality of active subsystems (208, 210, 212) operable to effect a condition in a habitable space, said method comprising: - receiving identifying information by the at least one processor, the identifying information which identifies an individual who will occupy a habitable space; and - adjusting, by the at least one processor, at least one respective operational parameter of at least two different ones of the active subsystems of the habitable space during at least a portion of a period of time that the individual will occupy the habitable space, characterized in that - said adjusting the at least one respective operational parameter includes adjusting based on at least one attribute, trait or characteristic of the individual identified by the received identifying information a level and a color temperature of artificial lighting, and adjusting a level of natural lighting allowed into the habitable space such that the level of artificial lighting and the level of natural lighting are combined to form a first circadian pattern for a first time zone related to a location different from a local circadian pattern associated with a second time zone related to a location of the habitable space. - said environmental control system including -- at least one processor, -- at least one nontransitory processor-readable medium, which is communicatively coupled to the at least one processor and which stores at least one of executable instructions or data for the at least one processor, and -- a plurality of active subsystems (208, 210, 212) operable to effect a condition in a habitable space, -- at least one processor, -- at least one nontransitory processor-readable medium, which is communicatively coupled to the at least one processor and which stores at least one of executable instructions or data for the at least one processor, and -- a plurality of active subsystems (208, 210, 212) operable to effect a condition in a habitable space, - receiving identifying information by the at least one processor, the identifying information which identifies an individual who will occupy a habitable space; and - adjusting, by the at least one processor, at least one respective operational parameter of at least two different ones of the active subsystems of the habitable space during at least a portion of a period of time that the individual will occupy the habitable space, - said adjusting the at least one respective operational parameter includes adjusting based on at least one attribute, trait or characteristic of the individual identified by the received identifying information a level and a color temperature of artificial lighting, and adjusting a level of natural lighting allowed into the habitable space such that the level of artificial lighting and the level of natural lighting are combined to form a first circadian pattern for a first time zone related to a location different from a local circadian pattern associated with a second time zone related to a location of the habitable space.