Wireless Sensor and Actuator Networks for Lighting Energy ...

(5) At the 20 th minute the test ends, the participant is debriefed and interviewed, and
their questionnaire is collected.
Testing Procedures for Participants First Exposed to the Commercial System
(1) Participants start with the commercial system with the initial desktop illuminance
of 500 lux, use the remote controller to override the initial condition to a
comfortable level, and begin working on the task of their choosing.
(2) At the 5 th , 10 th and 15 th minute the lights are again dimmed or brightened by the
investigator using a second remote control, without notifying the participants.
(3) At the 20 th minute the investigator will stop the first set of the experiment and
ask the participant to take a 10-minute rest outside the office. Meanwhile, the
investigator will switch the lighting to the mote-based research system, and set
the initial desktop illuminance to 500 lux. Participants will be asked to use the
GUI to override the initial condition to a comfortable level after settling for the
remaining experiment.
(4) At the 5 th , 10 th and 15 th minute of the second set experiment the lights are
dimmed or brightened by the investigator with the GUI at the investigator station.
(5) At the 20th minute the test ends, the participant is debriefed and interviewed, and
their questionnaire is collected.
(6) After the participant leave, the investigator will resume the remaining procedure
of the sensor placement experiment and gather photosensor and light meter
measurement as described in previous section.
234