LXMG221W-0700034-D0 is an LED driver from Microsemi Corporation that has gone obsolete. 2367-LD40W-54-C0700-ND from EPtronics, Inc. has been offered as a possible substitute.
To verify this part will work in your application or to view full specifications see the manufacturer datasheet. https://eptronics.com/documents/LD40W%20Data%20Sheet.pdf