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yes you can use resistors too, circuit you shown will work, use 2.7Ohm 3W resistors for 12v input and 1000mA led current.
thats a good tool for calculating resistor values Current limiting Resistor calculator for leds
there is plenty of power wasted on resistors when used for high powered leds, to avoid that you use electronic SMPS drivers.
thats a good tool for calculating resistor values Current limiting Resistor calculator for leds
there is plenty of power wasted on resistors when used for high powered leds, to avoid that you use electronic SMPS drivers.