[LW90DIMR1-1L]

A driver operates at a fixed flow rate (350/700 / 1050mA) and to measure multiple LEDs connected Serial voltage is higher (up to a max varies by driver).
A power supply provides a voltage constanste off, current is conducted on the basis of the tax.
Voltages are available in 5 volts, 12 volts (most used for strips up to 20 meters), 24 volts for larger installations.