400W sodium light on Juliette

So I have one of those high powered sodium lights and a generator to run it. I bought it to catch herring at night on Juliette. I was thinking of trying it for crappie Juliette this fall. (I don't fish crappie in warmer water. I guess I have a prejudice about wanting my crappie as fillets and caught when the water is at least cool.)

My plan is to go out in the evening and dip around looking for crappie on the standing timber. If I catch some, I think I'll put the light out at sundown and see what happens.

I'd sure appreciate any pointers on when, water depth, general type of locations, etc.

I know a guy here near me that fishies at night once or twice a year using his sodium light. He and his brother stay out pretty much the whole night and catch upwards of 150 crappie a night. That's on Clark hill fishing in @ 30' of water. They are diehard striper fishermen but like to put up a few messes of crappie to eat each year.

Surface temp. was 83 this morning. I'm thinking another five degrees and I might try it. Would y'all recommend a brushpile in 20' or head for the channels in timber?