Hmm I guess you are concerned about energy usage?
I added this one this year and turned an unused, dark 1/5 of the kids' playroom into a jungle -- avocados, mangos, citruses, tea shrub, overwintering eggplants, stevia, banana, pineapple, ginger, mints, hot peppers, tomatoes, aloe, etc. etc.
This area was first to be infested by the TRM (some dead plants have already been removed). I also replaced the bulb in the torchere in the room to a giant photographers CFL bulb. The air quality in the room has noticeably and significantly improved. It doesn't hurt that the Meyer lemon has started to bloom
, though I miss the fragrance in the a Family Room where it was situated last winter. We sat under the canopy of the "Jungle" and I found myself breathing deeper.
The "playroom" would be called the "dining room" on a realtor's floorplan, right off the kitchen - the heart of our home. Although the kitchen window sports two utility lights with CFS, amount of space in the kitchen that I can begrudge the plants is limited to a single window bench. So this room now also functions like our house's natural air filtration system. -- DD's are now calling it "The GREEN Room"
In the Family Room, I have another fixture like the one pictured above, and this was dubbed "The Winter Wonderland" and has been my main Winter Indoor Tomato and Pepper growing, as well as blooming orchid display area. I had the Meyer lemon here last year. And in the summer time, the SE-facing window-side, cleared bar-height surface with the overhead light fixture becomes my kids' project space. I have a two t-12 fixture standing vertically on the floor that provide light for the old "Cool Gang" avocado forest space, which is currently hosting the Orange Pixie tomato, which I recently described in the Winter Indoor Tomato thread, a large pot of beautiful celery, one of the Fish peppers that is currently sporting 5 orange-turning-red fruits, smaller rosemary, a rooted Petit Negri fig cutting I took earlier in the year, overwintering Donkey Ears pepper, and a citrus, as well as the seed grown coffee -- now towering over behind us on the sofa table, slowly declining Lettuceleaf basil and the overwintering Scotch Bonnet pepper with two remaining fruits.
I have one more same fixture in the garage which is the "V8 Nursery" and is currently growing winter lettuce and salad greens, onion/garlic greens, as well as keeping alive the larger pot of rosemary, still blooming pots of pineapple sage, as well supplying light for the dormant Petit Negri fig.
In addition, there is a two-T12 tube fixture providing light and some warmth for the dormant peppers, pomegranates, lemongrass, and -this year- big mama banana.
I have a major light/energy hog dubbed "Winter Paradise" on the NW facing window-side bench seat, which is the vinyl covered 30" plant shelf with two interior shelves. I have cobbled together lights for each shelves and also have another light setup for plants on the top outside of the covered shelves. Inside of this "indoor greenhouse shelves" in the only place that stays in the 70's during the winter months, and I grow tropical plants that need the extra warmth in there, which include orchids that are currently sending up flowers stalks and setting flower buds.
All of these (except the garage set up) are in the first floor living areas. Upstairs in one of the girls' bedrooms, I have another plant area with two utility light CFL's and the lights are bright enough that she often doesn't bother to turn on the overhead light
I try to keep at least some of the fragrant or blooming plants in there -- cinnamon basil and the two jasmine pots at the moment -- and this winter, there is also the fruiting espaliered Coyote cherry tomato.
For my situation, all of these extra lights work out very well because we homeschool and we're home most days especially in the winter. No winter blahs and seasonal disorders here, and vast majority of the plants are food bearing plants and some are still giving as winter solstice nears and we head into the depth of winter.
...and later on, V8 nursery and parts of Winter Paradise will be turned over to winter seed starting depending on temperature needs. By that time, some of the edible plants will have finished producing or will be declining due to constrained root space or other issues, and as thaw approaches by late February, it will be possible to send some of those plants outside for the remainder of the winter and early spring. Eventually, I intend to figure out the season extension outside with use of coldframes and covered poly tunnels, etc. and then, I may be able to keep the garage V8 Nursery lights off for a while longer in the fall and turn them off earlier in the spring.
Indoors, the plants get moved around and regrouped as they decline or as the outside temps become warm enough to send some of them outside, and the sun start to come around further east to rise earlier and set later further west, providing more light from the windows get turned off in sections. Then the lights are turned off in sections as they become unnecessary.