About all you'll be able to do is keep your seedlings happy with only two, 2 foot T12 tubes. Ideally you'll want to keep the T12 tubes only an inch or less away from your leaves and watch growth closely so you can raise them as they grow. If you have to go with T12's I'd suggest getting at least four, 4 foot T12 tubes with grow spectrum daylight bulbs. These will give you enough lumens to keep your 10 plants adequately covered. If you can afford a T5 lighting setup they are MUCH brighter and have very little heat also. Before T5's were available I used to use T12's for vegging. T12 fluroescents work well if you're not in a hurry. If you make sure you keep the lights very close to your plants it will keep them from stretching.

As soon as your kids pop up get that humidity dome OFF to prevent damping off (rotting of the stem). Have a gentle fan in the room moving air over the soil surface and stems and this will also help.

I can't follow what Home Depot dude is saying... Are you anywhere near a place that has indoor gardening/hydro gear?

Good Luck!