I have a customer who would like a well lit backyard due to a recent break in attempt. He is against the appearance of a "farm light" but want's it to be well lit. With neighbors quite close on each side(approx 50' from C/L of his house), what size wall pak would anyone reccomend for this type of application? Mounting height will be around 18' from the ground.I don't want to overlight the area and raise concerns from the neighbors nor do I want to underlight and have a dissatisfied customer. Unable to get any good advice on this from local supplyhouse or box store associate. My original guess would be something in the 100W MH style and that's only a guess. Thanks.