If you want to see the exact process of it being built, I've uploaded a video guide here:
Step 1: Collect Desired Materials
We'll also need something to mount everything to and focus the light, in this case we'll use a bucket.
Step 2: Measure Twice, Cut Once
Begin by making a hole in your container just big enough to thread your socket through, for this I used a razor knife.
Once the hole is cut, go ahead and thread your socket on. This is when I went ahead and attached the case for the power switch.
Step 3: Strippers
Once your wires are cut and stripped, you're free to attach everything.
Make sure that once everything is connected that there aren't any lengths of exposed copper that could touch off and electrify any metal of the casing or mounts. My lamp cord didn't offer a ground connection, albeit I wish it had.
Step 4: Assembly
I wanted to keep mine only so that I could label it.
Step 5: Nighttime Light Time
This isn't as simple as it sounds, since I insisted on using an LED bulb, I had to find one that was dimmable. Just for the sake of showing that the Softbox functions, I put an Edison style bulb in it.