What is the condition of the lights?? If they're cloudy or sand blasted, that can hurt light output. Also how old are the bulbs?? (you don't have the GT, with HID do you? ) as bulbs get older, they seem to loose output. Have you had the aim itself checked or have a lot of Junk in the trunk making the rear sag (& the lights point @ the trees ?? )Just a couple things to check out...
Roger
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View my fuel log 2018 Mirage GT 1.2 automatic: 37.3 mpg (US) ... 15.9 km/L ... 6.3 L/100 km ... 44.8 mpg (Imp)