Too dumb to fix my map

[Sam]

Aight new day new problem. I got the route done, so I'm working on lighting and details now. Wanted to use one texture as a light source so I tried creating a lights.rad in my cstrike, but it doesn't work. Googled for like 30 minutes now, no idea how to fix.

Another question would be if I can even use lights.rad since I don't know how the server handles something that normally gets placed in my personal cstrike folder.

EDIT: Horsefeathers helped me out so no need to answer this