I actually did the same thing this year for my orchids and other house plants for the winter. I had a four shelf wire unit with movable shelves that is aprox 4' wide and 16" deep and the unit is a little over 6' tall. It was originally used for storage and extra shelves in a back bedroom. I used the bottom of the top and the shelf below it, I could use the third shelf if I wanted to. I used two shop lights like you did and I used 1 cool and 1 warm in each fixture and the chain and hangers I used 'S' hooks to fasten them to the wire grid above them. I also used the plug bar but I added a timer so I didn't have to worry about turning them on and off. I used plain ole every day aluminum cookie sheets to put under the pot saucers so I could keep water under them to raise the humidity around them. It's worked out really great. I may add the third tier next year.

I think may people out there could use this kind of stuff as the one you would buy through a catalog are like 250.00.

Kurt - Glad to hear about your success story growing your orchids! You reminded me that I have something similar to your shelving unit out on my screened porch. It was confiscated from the trash at a local fast food restaurant that was renovating their store. It had a little corrosion on it that I used a wire brush to clean and then I spray painted it silver and it looked brand new. I also have orchids sitting in pots on this shelving rack!

Your idea about using a timer on the lights is a terrific idea! And I love the idea of using cookie sheets under the pots with water added to provide humidity! Perfect solution for dry winter weather!

Thank you for your message beckygardener. I appreciate your input. I'm putting on pic up so you can see what it looks like at the moment. I think I'll put another two lights on the lowest shelf in the fall.

Kurt - THANK YOU for your great ideas!!!! Sending 2 acorns your way for your great suggestions and awesome looking grow shelving unit!