If this is the Thor rated at 15,000,000 CP, and uses the 130 Watt bulb, then MAYBE it would hit a target at 1500 Yds but I think you would need to stand away from the light source and use binoculars to see the light hit the target. Not really usable light at that distance. The 130 Watt bulb powered from its' on-board SLA would only see about 102 Watts. You need about 14.4V to see the full 130 Watts.
A long time ago, a member NEWBY, was going to make some boost boards to do just this. Unfortunately, it never happened.