Methods and apparatus for generating and modulating white light illumination conditions

An illumination system for a marketplace that comprises a consumer environment configured for the sale or purchase of goods or services, the system comprising:

• at least on LED-based light fixture including:
• at least one first white LED characterized by a first spectrum having a first color temperature;
• and
• at least one second white LED characterized by a second spectrum having a second color temperature different than the first color temperature,
• wherein the at least one LED-based light fixture is configured such that radiation comprising essentially white light based at least on the first spectrum and/or the second spectrum, when generated by the at least one LED-based light fixture, impinges on at least one article disposed within the consumer environment for sale to a purchaser;
• and
• at least one controller coupled to the at least one first white LED and the at least one second white LED and configured to control the at least one first white LED and the at least one second white LED so as to dynamically vary over time a third color temperature of the essentially white light in response to at least one sensed condition.

An illumination system for a marketplace that comprises a consumer environment configured for the sale or purchase of goods or services, the system comprising:

• at least a first LED-based light fixture and a second LED-based light fixture, each of the first and second LED-based light fixtures including:
• at least one first white LED characterized by a first spectrum having a first color temperature;
• at least one second white LED characterized by a second spectrum having a second color temperature different than the first color temperature;
• and
• an addressable controller for receiving and processing lighting instructions that are formatted as at least one network signal,
• wherein the first and second LED-based light fixtures are configured such that radiation comprising first essentially white light from the first LED-based light fixture and second essentially white light from the second LED-based light fixture, when generated, impinges on at least one article disposed within the consumer environment for sale to a purchaser, and
• wherein the addressable controller of each of the first and second LED-based light fixtures is configured to dynamically vary over time a third color temperature of a corresponding one of the first essentially white light and the second essentially white light in response to the at least one network control signal.