Hmmm... lets see, characteristics of HID are, unstable color temp, unstable operating voltage through life cycle, heat generation, slow ignition, need for a ballast. I think they are good for illuminating baseball fields.
The ionization voltage of all HID lamps increases greatly when the lamp is hot. If power to the lamp is interrupted, the lamp must be allowed to cool for a time, usually several minutes, before the arc can be reestablished and normal operation resumed
---http://www.unvlt.com/techsupport/trouble_shooting/HID_tech_guide.html
I would rate HID lamps as probably the least suitable for photographic enlarging.