The only thing against foil is its weak reflectivity and a chance that the crinkles will focus hot spots and burn your plants.

Since you just watered/fed, let the seedling dry out a little but not completely(just right around the stem). forcing the plants to search and suck the dirt dry before watering again will ensure steady growth.

Dont feed again until like the third watering from now. If they are showing growth signs, they should grow a node or two in that time.

And CFLs are fine for veg. Its in flower that they come up short compared to an HID.

This one plant was vegged under 4x26W CFLs
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