It's the design of the lights amigo. One bulb (or aftermarket LED) powers the inner ring directly. Fiber optic tubes capture some of this light to direct it towards the outer ring. Due to this style of design the outer ring will look weaker at almost any angle other than dead on at +15 feet.
M3 Edition Grilles|Painted Reflectors|Matte Black Vinyl Window Trim|CF Performance Spoiler|35% Tint|19" Satin Black Avant Garde M359|Lux H8 V3
OEM Aero Lip|M3 Side Skirts|M3 Mirrors|LCI Tails|M-tech Rear|Duke Dynamics CF Performance Diffuser|Cyba 4.0 Black Chrome