Spotlight for night video at track meet?
 

I video runners at 300 FPS and 1/200th with my Casio EX-F1 and get excellent results during the day.

But many of the longer races are run at night when its cooler.

There are floodlights around the track, but they don't offer enough light.

As I am often tracking just one runner, I'm looking for a battery-powered spotlight that will throw enough light to illuminate just one or two runners about 30' away as they run past.

Any recommendations?