Whats up Acornmania. Welcome to the wonderful world of growing!

In terms of light spectrum.... It will sometimes say on the packaging what spectrum it is.
But they will actually look either blue or red(more orange-ish actually)
And the blues are usually more expensive

I usaully do about 80% BLUE and 20% RED for veg and vice versa for flower.
having a mixed spectrum is best, mimics nature better.

DEF. get the emergency blanket, more reflection the better, but al foil is nooooo bueno!

What are you going to do for feeding once they are bigger?

Good luck and keep posting updates and pictures.
I learned ALOT on my first grow....All from this site.
So pack up a big ol bowl, put some music on and get to reading

Good Luck!
Hanayama