| 摘要 |
A system may include a housing, a light sensor, and a knob protruding from the housing and configured to rotate between angular positions about an axis. The knob may be configured to receive light from directions generally perpendicular to the axis, and the light sensor may be arranged to receive the light received by the knob. A method may include installing a light level control device having a light sensor, and adjusting the field of view of the light sensor by rotating a knob on the light level control device. The light sensor may be arranged to receive light from different angles in a plane substantially perpendicular to the axis of the knob.
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