I have an approximately 1 meter LED strip in "warm white" running from a 2 amp power supply for some time now with no problems. I want to add another strip, of about 2 meters, to this same power supply. This second strip will have a switch on it, so sometimes the power supply will power 3 m of LEDs, sometimes just 1 m.
Should I up the amperage? Is it better for the amperage to on the high side or on the low side?