Replaceable lighting unit with adjustable output intensity and optional capability for reporting usage information, and method of operating same

摘要: A lighting unit includes a power supply, light source, controller, and an output intensity adjustment mechanism. The mechanism is configured to allow user set of plurality non-zero intensities generatable by the source. controller operable control supply electrical from source such that illuminates in accordance with user. also optionally report usage information for (e.g., cumulative on time) using produce visually undetectable signal. further adjust increase) supplied when time corresponds point lumen depreciation curve indicating reduction intensity.