The present invention describes a method manufacture of an ammonium sulfate composition having a total organic carbon content of 1% by weight or less than 1% by weight, based on the total weight of the composition, comprising the following steps:a) reacting i) waste sulfuric acid comprising an organic tertiary amines with ii) ammonia in an amount sufficient to obtain a pH of 9. A web service performance index is generated based on the collected service metric data. Accordingly, even though the LED dies corresponding to a certain predetermined lamp specification are empty or are insufficient in reserve, the invention still suggests using other reserves or non-empty LED dies with different characteristics through the established collocation lookup table for manufacturing an LED lamp of a certain specification.