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![schematic](https://i.sstatic.net/90f0W.png)

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Hi there,

I have a question regarding the schematic shown above where I have 8 LED's connected in parallel each having a switch on itself. Since the supply voltage is 12 volts constant, there wouldn't be a problem of lighting all the LEDs at the same time. However, I assume if I want to light a single LED with this supply, I would probably burn it down. My question is how to handle this power problem (How can I adjust the circuit by adding different elements) if I want to light only a single LED or multiple ones with constant voltage supply. Thanks in advance.