The 4 ft shop lights work well.You need to be able to move the plants or the light to keep them close together. If the light is to far away your plants will be leggy. You have better results with fresh bulbs if you use your lights all year. A small fan that indirectly keeps air moving around the plants will make hardening off much easier.The big problem most people have is Damping off. If you don't use sterilized soil and don't let the soil dry out good between watering. I always start a few things early .Hard to get tomatoes and some of my Heirloom seeds.

Dumb question, but do you ever have problems with smell or bugs indoors?

I don't really have a great place to start seeds except for in a big closet neat the kitchen. A few years ago, I started persimmons seeds in there. I had a big problem with those flies that sort of look like fruit flies only bigger. I controlled them with Sevin, but they'd come back. Wifey put the kibosh on the whole indoor planting idea because we had those annoying flies all over the kitchen.