They have helped raise the number of high-voltage lines in use from 20 to 34.
他们帮助提高了高压电线的使用数量，从20个提高到34个。
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This number can then be used to derive any adjustments to the drive current or voltage in order to keep the flux output (or the color output of an RGB series of LEDs) inside the visible limit.
Switching and measuring voltage sources with high internal impedance are subject to a number of errors, including offset currents, stray leakage paths, and electrostatic interference.