This shot will be from directly overhead, with the dancer herself in the bottom 1/3 of the frame, and the shadow taking up the top 2/3 of the frame.
So, I obviously need a strong/bright, hard source that creates a nice sharp shadow.
The floor will be WHITE and approx. 15'x30', so this source needs to be able to fill up this entire space from a ~15 foot distance, and create/expose for pure white at 640 ISO, 1/240 sec exposure, f/1.4-f/2.
Will an Arri 1.8 HMI with a wide lens suffice? Is there any other unit I should consider that can run off house power, is very bright with a WIDE spread, and is less than 30lbs? The light will be mounted onto a jib/dolly combo so it can move up and down, left and right.