[agla]

Almost any light manufacturer has photometric charts for each light, lamp type,post height, etc,... There is correct way to do this without guessing. I've had a little exposure to it, but I would hope those of you doing lighting design would know more about this than I do.

I've had to include these chrts in plans so that planning boards can pretend to know what they mean. They basically look like contour maps showing the intensity of light. As they overlap, you add them together.

Call your light manufacturer. They almost all have sales reps that want to help you in order to make a sale. I know someone working for a big lighting sales company. She told me that there has been a big slow down in demand in the last few months. I expect that you will have fast response if you make the calls. They will know how much light is required on a tennis court.

From what I see on a quick surfing mission. (6) 20' high poles with 1,000 watt bulbs is not overkill.