Luminescence values are relative and depend on the experimental system. For example, luminometers from two different manufacturers each may have 6-log capability, but one may measure a range of 1 to 1,000,000 relative light units (RLU) while the other measures 0.01 to 10,000 RLU. Both instruments can measure a dynamic range of 6-log units, but they read out different arbitrary units.
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