No. Lighting and drying performance are separate functions. An illuminated drum shows that one feature is active, not that heat and moisture management are correct.
Understanding this situation
Likewise, a failed lamp does not establish that washing or drying has failed. The programme result, warnings and other changes need to be described separately so an enquiry is not based on one visible feature.
A useful next step
Use the appliance normally only where safe and follow the manual for any owner-replaceable lighting. Do not remove covers to reach a presumed bulb. Report the lighting concern alongside, rather than instead of, the actual drying result.
Manuals and supporting guidance
Model-specific instructions take priority. These references support the practical principles discussed here; they do not diagnose your appliance.