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Ming the Murphyless Ming the Murphyless is offline

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LED wiring

I need to wire four white LEDs to run off a 12v dc supply (regulated).
The Vf is 3.2-3.6 The calculation gives a resistor value of 220 ohms for
2 LEDs in series. Can I wire all four in series without using a
resistor or are there good reasons for having it? The LEDS will be lit 24/7

TIA

Bob

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