Good idea I would assume so. Depending on what LED's you are powering, it would probably be a good idea to put a relay in so too much current isn't drawn through the 484 circuit.I may have found a solution!
I am reading Ford headlight switch diagrams, and apparently there is a circuit 484 (O/BK) which is hot when the ignition is on but off when the switch is turned to Parking or Headlights On.
This circuit is used to illuminate the radio LCD during the daytime.
Could I use this circuit to power my DRLs?
Might use this idea myself. I need to replace my OEM headlights and will probably rewire it then