Nope.
Look at most LEDs, they've got some fairly small emitting angle of 120 degrees or so compared to halogen or HID.
The efficacy is excellent, my dive torch is a cree XM-L making around 900 lumens from under 10W of power. You'd need closer to 50W to get similar performance from halogen.
They can also have some serious throw with the right optics.
However, nothing you can drop into the standard headlights to get anything like a reasonable result in terms of proper beam pattern, brightness and throw.
Best bet would be to make some with some XMLs or SST-90s behind some 40mm or so aspheric lenses and have them as fairly tight beams to add throw to the high beams.
SST90:
(photo borrowed from packhorse of candlepowerforum/ccrexplorers forums)