I buy mine from a local nursey but I'm sure most home improvment stores have them also.
I use the long ones that attach to the wall and hang over the plants.
I keep my plants in my garage which may or may not be OK for you, my garage lets a whole lot of light in and since I live in Southern Texas it does not get to cold and has light so like I said were you live may be a huge factor.
I do not advise real tender herbs inside but I grow, mint,catnip,thyme,rosemary,garlic chives,parsley and cilantro inside during the winter, in fact half my garage is a garden.
I have already started growing stuff.