It shows nice on video recording when the room is dark and a torch supported on the treble keys illuminate the rest of the keyboard.
The LED may be connected to a capacitor slowly dimming, exponentially or naturally as time goes by. For example the IKEA stores hand cracked torch.
Advantages of this lighting method:
Mystery
When a key is depressed the reflection stops so it looks like it disappears or being switched off.
The capacitor discharging gives a contineous movement or change or light intensity which is natural or exponential. So there is smooth contineous change although the cadre is static.
Great for music educating piano playing of popular songs videos. It is very clear to see which keys are being played.
A possible channel could be
Playing by ear brain
A taste of Honey
And it is a play of light too.
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