Depending on the variety, some tomatoes need a LOT of sun. I've tried mini-cukes indoors and outdoors, and they always caught fungus and died horribly. We have some seeds for indoor tomatos, but I think it's too late this year to start them.
These cayennes are several inches long (though ya can't tell from the photo) and have done well just under the grow light and then on the window sill. The jalepenos were not growing much at all - although they've got a great root system - until they went in the window. They just took off then, and are about 2.5 ft tall. They really like heat and light.
The neat thing with peppers is that as you harvest them, the plant will put on more flowers. So, my trusty little artists' paintbrush and I pretend we are bees and polinate them regularly, with a pretty good success rate on the cayennes. [Could harvest those now, but I'm going for maxium heat as I intend to dry them and then crush into a powder to use in chili, etc.] Hopefully I can keep the production going well into the fall, harvest, hang them to dry, and then keep the plants alive over the winter to try to do it again next year. I did have a Ring-o-Fire in California that we kept going for three years before it just gave up.
Have had an interesting time with aphids, I have to say. The little Ring-o-Fire is small enough that every couple of days I take it to the kitchen sink, turn it sideways, and wash the little rotters off with cold water from the faucet. It's always amazing how many there are in the water. The other plants I'm using a q-tip and bug spray - spray some in a little container, dip q-tip, judiciously apply to bugs and the area around buds, where they are going to want to go. So far I'm winning. (So far.)