Charge/low voltage indicator lamp

[Underwood]

Rotax 912 with Ducati Regulator/rectifier....normaly fitted with a light that comes on when the master switch is engaged and remains on till the engine's generator is producing sufficient voltage then goes off.

on shutdown of the engine the ligght will come back on untill the master is turned off.

 

A quick question to those who have the above with a capacitor across the regulators output, when you switch the master off, does the charge indicator light go off immediately or does it slowly fade out taking a second or 2?