My Light Box for my Seedlings

I recently made me a new and improved light box. I don't have great window exposure so I put my seedlings in  light box to get them going. I've been using a small cardboard one for the last couple years, but it finally gave up the ghost. So, I got ambitious and made a 4'x2' box out of OSB. It's not an ideal set up, but it will have to do for now.

As you can see, it basically just a big box completely lined with foil with a light bulb stuck in the top. As big as this box is, though, I think I will need to add another bulb. Hopefully in a few weeks I can show some pictures of slightly bigger plants! :)