this so called "lag time" is nothing but the systems capacitance. All systems
use capacitors in them for there power needs. A capacitor is basicly a small
battery type component that releases its enrgy (discharges) immidieatly. When
a surge of electicity is needed, instead of turning to the main power souce,
it turns to these capacitors. In reverse, when power is shut off, the system
is no longer getting power from its main souce so it turns to the cap's.
Since the caps arnt ment to handle much more then a short surge of power, It
ony lasts for a short time. Thus, LED stays on for a second or two you hit
the off button.
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