But has anyone quantified how 5000K versus 6500K, 90+ CRI LED backlights affect visibility of faint weft bars and oil streaks during inline inspection? On our frame last week, 6500K plus a frosted 1.5 mm diffuser raised true positives about 12% at a 0.8 defect confidence threshold, but also spiked false calls on dark twills. Looking for diffuser materials or angle-of-incidence tweaks that maintain contrast without glare.