Lag

The condition where the current is delayed in time with respect to the voltage in an ac circuit (for example, an inductive load).

Lamp Lumen Depreciation, LLD (Lighting)

Information about the chosen lamp and its lumen depreciation and mortality are available from lamp manufacturers’ literature. Rated average life should be determined for the specific hours per start; it should be known when burnouts occur in the lamp lif

Isotropic Antenna

A theoretical, ideal antenna having a signal range of 360 degrees. It is used as a baseline for measuring a real antenna’s strength signal, in dBi, where i represents Isotropic Antenna.

Isolation Link

A metal link used in series with a fusing device that melts and prevents refusing/re-enerization of a transformer.

ISM Band

The 2.4GHz frequency spectrum. ISM is actually synonymous with 2.4GHz, however it stands for Industrial, Scientific and Medical.