Oh interesting! I have sensitive eyes and have always found my Glo too bright to read in full darkness, even at the lowest setting. Previously the GUI would not go down as low as 1%, which is why the FrontLightLevel was used in the config file to get it down to 1% brightness. With current software this is no longer necessary as the GUI now provides the full range of 1-100%... but I have never wondered whether there was anything less than 1% (I just assumed it wouldn't understand any decimals). So I am curious to find out if it would work, and if it does work, whether there is a visible difference.
Trying fractions in the config file won't brick your device! If it doesn't understand the setting it just won't give you the setting.
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