What Is a Constant Current LED Driver, LED power supply, DC-DC converter

  100 - 277Vac, 100W, 4100mA, 12-24V, IP66 LED Driver

https://www.futureelectronics.com/p/semiconductors--Led-lighting-components--led-driver-modules-rev--constant-current-acdc-led-drivers/xi100c410v024fns1-signify-north-america-1087256