I guess I don't know. We installed them on new standard telephone poles and the work was done by a high-line, high-power lightning company (they shoot at our club). It appears that they are about as high as the standard telephone pole, and we angled the lights down NO MORE than 10º.
These are kinda pricey so see if one of your members can buy them wholesale.
I gave some old 1000W lights just like these 1500W to the Sidney NE trap club run by Cabela's. Never heard how they worked out, however.
Up here in Alaska we do shoot a lot in the dark for fall and spring leagues,the range is going to try LED lights.It will save about 150 dollars a month per range and about 5000 a month overall,the LED lights are not cheap either about a 1/3 more expensive.The nice thing is instance light,not the 3 to 4 minutes to start with the old ones.
I have been out of the business for years now but the standard used to be:
2 poles per field,
2 1500 watt Metal Halide fixtures with a Type III distribution or, 3 1000watt Metal Halide fixtures with a Type II distribution,
Mounting height above ground was recommended at 20 feet the deal here is you do not want the firing line too bright (either of these arrays will provide approximately 30 footcandles on the target @ 30 yards and 5 footcandles on the firing line) and you don't want too much down angle for the fixtures,
poles placed between posts 1-2 and 4-5 about 2' behind 27 yard line,
You may want to use more setback just in case the max yard line is extended,
personally I liked using the 6 fixture setup because if one lamp goes out you can still see very well. These arrays are recommended for recreational shooting and came from GE and the Illuminating Engineering Society. Any Sportslighting manfacturer/distributor should be able to provide you with the most recent recommendations along with schematics. JRM
You have 2 fixtures per field we have ten so we must be 5x brighter. I don't know if ten fixtures per field are required but it looks like daylight out to about 150 yards from the lights. When the county that owns the range spends money on lights, they really spend money. Must be why practice is $9/25. ;-))
Musco is the way to go!! Notice that the electrical boxes are all at ground level so you don't have to climb to work on them. They are offered with a 25 year warrenty. cost per lumen is the best in the business and if you forget to turn them off all you can call the corperate HQ and they can turn them off or on for you.
There is good reason that Musco lights NASCAR, MLB, NFL and many many more venues.