In such a case, the running cost of tennis court field lights is 35000 x 0.12/ 1000 = $4.2 per day. For a month, it will cost $126. For metal halide, it will cost 70,000 x 0.12 / 1000 = $8.4 and for a month it will cost $252. Moreover, the cost of the lamp depends on the size of the club, lux level, and pole height.
https://www.topsportsled.com/2020-guidelines-for-best-tennis-court-lighting