I'll probably be running three 575w fixtures at 375w for no more than 30 minutes a show, for a run of, say, 10 shows. If each fixture pulls two
amps per hour (I'm guesstimating here) that would mean one amp so so per show.
Now, if I set up three lights on batterys with 12 amp hours, does anyone think that, by the last show, the light would be signifigantly
dimmer? I'm not certain about how effective a battery with two ah left on it would be.
Another idea would be a dimmer on the unit, rather than a switch, and we could regulate the power draw a little more. Plus, more flexibility! And more money...
I've thought a little about the cord and track... this director is just getting started and, given my past experience with him, I see where he is trying alot of new things and I'd like to offer him a lot of flexibility. He understands, though, that he will have to balance cash vs flexibility. I also think he is imagining a lot of free form running about with these fixtures, crossing paths and doubling back on stage, and I don't think he would go for tracks and cables in the end.