I've used these seed starter containers for the last four years. In fact, I just planted some today to see if I can get a jump on Spring (Mich.) They work well however, you will probably wind up transplanting to larger containers prior to placing them in the garden depending on their size.

Madbloomer-I think the little "GH" you are referring to are those units with the wire shelving and the zippered plastic cover? Do you intend to use it outdoors or indoors?

If indoors, yes you would need some lighting of some sort to successfully grow on the seeds once they were germinated. Otherwise the seedlings would grow very weak and stretched because they would not have enough light. I'm not sure if those units are sturdy enough to take the weight of a light attached to the frame and you would need one for each shelf.

If you're starting the seeds indoors, you don't really require one of those GH's anyway, if you start your seeds in flats with the clear dome covers. That is enough to hold the humidity in. You just need something sturdy enough to attached your lights to and a place to do it. Over a workbench or table in the basement or spare room perhaps?

If you were planning on using the GH outdoors, you need to be aware that those small units will heat up and overheat VERY quickly to the point of frying your seedlings and plants. You would need to constantly "babysit" it by being available to open the zippered door, move it to the shade, close the door or cover it during cold spells etc. They not only heat up quickly but loose that heat quickly when the weather cools down.

I guess I'm gently trying to dissuade you from using one of those units. They're not very sturdy, not very efficient and not really necessary.
If at some point you are starting enough seeds indoors that you need multiple shelves, I think you would be glad you saved your money for something sturdier like shelves built from wood or one of the specialty light table units.

Madbloomer go to walmart menards or lowes they have those heavy duty plastic shelves for around 25 dollars and you can connect a light on each shelf. Sometimes they are on sale we got ours for 18 bucks and it has four shelves. Barb

thanks everyone I get the idea. I will use flats with clear domes. I think what's most important is to have the lights. I do have shelfs I can use in the garage. What would be the best lights to add to them. I have read all kinds of mixed info on that. Again doing it on the cheap.
thanks

You can use a normal florescent fitting with daylight or coolwhite tubes. There`s no need to buy anything special for seedlings, compact florescent lamps (cfl) work well too.

I`d build an insulated box to maintain a higher temperature if the garage isn`t heated. Use a cheap timer to control the lights, 18 hours on 6 hours off.