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Too much voltage or will the current limit it? Answered

According to the circuit I need about 6 volts input to run a luxeon star LED. As I understand it, the regulator takes about 3v leaving 3v for the LED and will will provide a fixed current of 320ma which is just fine.

My question is, can I use a higher input voltage such as 12v without affecting the luxeon star? Although the current output is fixed, will the output voltage rise as the input voltage rises and burn out the LED?

Image reference http://led.linear1.org/a-cheap-current-regulated-luxeon-star-driver-design/1/

TIA

Richard:)

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Don't worr.It will give you fix 320ma without affecting LED