Not always. While UVF is powerful for detecting issues related to encapsulant degradation, polymer aging, cell-cracks visible via fluorescence changes, and related anomalies — it doesn’t catch every possible failure mode. For example, some degradation processes (like certain chemical corrosion, internal electrical connection failures, or defects unrelated to the encapsulant) may not produce fluorescence signatures. Therefore, UVF is best used as part of a broader inspection/diagnostic toolkit.