So, I looked online and found that the cheapest option was more than I wanted to spend, but I realized that it was something I could fashion myself. Based on simple indirect lighting principles, I made a lighted address box for the front of my house, and also made sure it had high contrast for daylight visibility as well.
For materials, I used only what I had laying around, but I understand that some people won't have these things, so here's a shopping list:
1x section of wooden shelf or other white-washed wood
1x section of plywood roughly the same size as the shelf
1x short length of pressure-treated 2x4, for the 2 box sides
1x LED rope light length (mine was 10 feet)
4-6x 3in deck screws or anchor bolts for wall mount
10-12x 1-1/2" deck screws for box assembly
(optional) remote controlled Christmas light pigtail
(optional) Outlet timer
Step 1: Build the box
But don't put it on the wall yet. I did this instructable after the fact and didn’t want to take it down again for the pictures. Ultimately the size of the box is up to you, and should fit your needs. The reason the spacers are there is to allow the light inside the box to difuse and reflect off the back material and then shine through the address without upsetting your neighbors. You want it to be bright enough to be seen at night, but not so bright that it shines on the clouds and calls for Batman.