Indoor tomatoe garden.? I planted my seeds within a soiless mixture under an HID and...

I planted my seeds within a soiless mixture under an HID and am curious to know the proper heat to maintain if sprouting the seed indoors. I may or may not go Hydroponic after the sprouts grow a few inches taller.

Does anyone know of a upright website that will cover the basics of starting an indoor vegetable garden. Thanks!