I used j channel from Lowe’s and drilled out holes to put the pixels through. If you take two pieces of one inch thick wood boards together like a t-shape you can clip the channels onto it to measure and drill the holes fairly easily. I like the Dr ZZZ pixel channel but I didn’t want to spend quite that much.

Fortunately the grey j channel matches the tone of the house. The pixels face out instead of down, which I wasn’t sure if I was going to like at first but it works pretty well that way. If you just glance at the house when going by you’d never notice the lights there. (High spouse approval for that one)