%LIGHT Returns Value "%LIGHT"

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http://androidforums.com – When I make a variable and set it to $LIGHT it changes to "$LIGHT" instead of a number like i was expecting...it does this whether ambient light is bright or dim. I have tried with auto brightness both enabled and disabled, tho auto brightness turns on automatically wen i enable a profile using the 'variable set' task, even before it runs the task. Anyone know why the %LIGHT isn't returning a reading? (General)