Adds glare effect to the meter.
In the above meters, the brightened region on the face of the meter the glare effect.
The glare effect is created by brightening part of the meter face. In the above meters, the face can be considered the part of the meter inside the silver ring, but including the silver ring itself. The face is divided by an arc, of which one part is brightened. The glare effect works best for meters with dark background.
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