The process of sequential measurement of operational parameters of LED lighting and other apparatus connected to a power line comprising an electric lighting enclosure in which all energy power lines (L 1, L 2, L 3...., L n) are located, whereby the stated energy power lines are also connected to a meter device installed in the electric lighting enclosure by which desired readouts are conducted, and where a number of LED lighting fixtures are connected to each energy power line, whereby each LED lighting fixture includes a power supply as part of the electronics within the LED lighting fixture, wherein the process consists of the following steps: a) a measurement of power or current after a stabilization period of the grid of approximately 2 seconds, and of the consumption of an apparatus that is not connected sequentially but immediately and of the initial/starting consumption of the power supply of each LED lighting fixture, b) sequential activation of all lighting fixtures at full power at each individual power line (L 1, L 2, L 3...., L n), by the stated power supply, which is programmed in advance for time-delayed activation of each individual LED lighting fixture. c) during sequential activation of each LED lighting fixtures on each power line (L 1, L 2, L 3...., L n), and after activation of each individual LED lighting fixture, power-time curve or current-time curves are measured and recorded for the corresponding energy power line (L 1, L 2, L 3...., L n), and from them a start diagram (P start) is derived after activating all lighting fixtures on that particular power line, and this diagram is used for comparing the consumption status on each individual power line (L 1, L 2, L 3...., L n), d) after activation of all LED lighting fixtures on each power line (L 1, L 2, L 3...., L n), the start diagram (P start) of the power-time curve or current-time curve of each power line (L 1, L 2, L 3...., L n) is compared with an initial diagram of the power-time curve or current-time curve for a corresponding energy power line, e) if deviations are found upon comparing the start diagram (P start) of the power-time curve or current-time curve in respect to the initial diagram (P i) of the power-time curve or current-time curve, errors in operation of the corresponding LED lighting fixture are signalled at the location or locations where there are deviations between the start diagram (P start) of the power-time curve or current-time curve in respect to the initial diagram (P i). a) a measurement of power or current after a stabilization period of the grid of approximately 2 seconds, and of the consumption of an apparatus that is not connected sequentially but immediately and of the initial/starting consumption of the power supply of each LED lighting fixture, b) sequential activation of all lighting fixtures at full power at each individual power line (L 1, L 2, L 3...., L n), by the stated power supply, which is programmed in advance for time-delayed activation of each individual LED lighting fixture. c) during sequential activation of each LED lighting fixtures on each power line (L 1, L 2, L 3...., L n), and after activation of each individual LED lighting fixture, power-time curve or current-time curves are measured and recorded for the corresponding energy power line (L 1, L 2, L 3...., L n), and from them a start diagram (P start) is derived after activating all lighting fixtures on that particular power line, and this diagram is used for comparing the consumption status on each individual power line (L 1, L 2, L 3...., L n), d) after activation of all LED lighting fixtures on each power line (L 1, L 2, L 3...., L n), the start diagram (P start) of the power-time curve or current-time curve of each power line (L 1, L 2, L 3...., L n) is compared with an initial diagram of the power-time curve or current-time curve for a corresponding energy power line, e) if deviations are found upon comparing the start diagram (P start) of the power-time curve or current-time curve in respect to the initial diagram (P i) of the power-time curve or current-time curve, errors in operation of the corresponding LED lighting fixture are signalled at the location or locations where there are deviations between the start diagram (P start) of the power-time curve or current-time curve in respect to the initial diagram (P i).