Save the dough and bring a partner to hold the light.
I use the 2,000,000 candle power spotlight we got at wally world. I think it was $29 with 2 lenses(yellow and red). One is a shooter and the other is a lamper.
John, I too bought the Optronics scope mounted light and it bit big time. Light didn't project the distance advertised, battery box was a PITA and it wasn't bright enough. I brought it back to Gander Mtn.and went with the hand held spot light.
I think Costco sells a 10,000,000 candle power spot light for like $50. Rechargeable too.