The light seems to be an emergency fluorescent fitting which has been converted to LED, the fluorescent needed a high strike voltage which can damage LED, and most conversions were designed for wire wound ballasts not electronic ballasts, as the electronic ballast made the fluorescent nearly as efficient as LED so no point. I know there were some conversions designed for electronic ballasts, but not many.
So I would be looking at proper LED fittings, not a conversion, to test one could easily destroy the meter, as some high voltages and also often the ballast is designed to shut down with no load.
Step one is to find out what emergency fittings are required.
The red LED suggests the emergency light has failed its self test. Best way is to test for power at both the permanent and switched live terminals at the light.
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