On Thursday, September 26, 2013 8:04:17 PM UTC-5, sms wrote:
The marching band at my son's school needs lights for the practice field. We've been renting lights for about $2600 for five weeks, not including fuel for the generators. This is for two 4000 watt lights (4 x 1000W bulbs). We'd like to find an alternative, even if we have to spend three-four times as much as five weeks of rentals cost. We don't actually need 8000 watts worth of light. We need lights for two hours a day, two days a week. There is no electricity available at the practice field. My idea is to purchase sixteen 4000 lumen 75W 12V HID flood lights, four 90AH deep cycle batteries, and eight 18' light towers. This would cost about $4000. The batteries would probably need to be replaced every 3-4 years. I was looking for some other ideas on how to do this.

Park automobiles/trucks in a circle around the practice field and use the car/truck headlights.