All I did was to purchase a large, plastic tub–any kind will do, really. I bought this one because it was large, sturdy, and it was only $13.
The first thing I did was to make a hole on top. This plastic wasn’t easy to get through, but the basic idea is to make a hole about the size of a light socket, so you can insert the threaded end of the bulb into the hole. Here is what it looks like from the bottom of the lid:
bottom view of lid with light inserted
And here’s what it looks like from the top view, once it is assembled. I used the same light, socket/cord, and plastic lid that I used for the cardboard version.
Top view of lid.
Once the light was in, I lined the lid and the inside of the tub with aluminum foil. I’m not sure if it matters whether you let the shiny or dull side of the foil show, but I like the shiny side.
underside of lid
inside of the tub
I didn’t use anything special to affix it to the inside, just packing tape. I figured that after one or two seasons, it would need to be cleaned out and replaced anyway.
And here’s another photo of the final product:
A Note: Once your seeds are sprouted: If your light does not put out enough heat to keep the moisture in the light hut at bay, you will need to off-set the lid so that it can dry out inside. When I do this, mine doesn’t get dry enough to dry out the soil, but it does allow the moisture to dissipate. If this measure is not taken, your plants could suffer mold, damping off, or perhaps even root rot.
off-set your light hut’s lid to avoid excessive condensation