What is an LED driver, DC-DC LED drivers, solid-state lighting solution

 347 - 480Vac, 150W, 700mA, 60-210V, IP66 LED Driver

https://www.futureelectronics.com/p/semiconductors--Led-lighting-components--led-driver-modules-rev--constant-current-acdc-led-drivers/xh150c070v210fnf1m-signify-north-america-7130588