3528 Color Temperature Adjustable LED Strip Lights,dual color 3528 led strip,Made of 60led/m(single row) or 120led/m(single row) or 240led/m(double rows); DC12V or DC24V input voltage;Warm white(2800-3200K)+Cool White(6000-6500K); The advantages(for the one made of 120led/m or 240led/m) is if you only want warm white or cool white,the spacing of two same colour temperature leds are not far.Ensuring the LED strip lights are uniform if lighting single-colour leds.