Devon Olsen wrote:it is possible to overwinter plants indoor and indeed grow them from seed to harvest under artificial lights, depending on your situation you either want HPS lights or LED
HPS lights penetrate much better so if you have a plant growing vertically or anything then this is your best bet
LED lights are quite bright and dont use much energy or produce any heat to speak off, some plants can grow right into an LED and have no issues but LED lights dont penetrate so well and so LED lights work best for flat, groundcover plants
if you are willing to look past what they are growing, marijuana growers have more experience than i do with growing plants indoors and visiting MJ growing forums may give you the best answer you can get online being that they grow plants indoors completely on artificial lights out of neccessity of not allowing the plant to be seen, i recommend the grasscity forums if you choose to go that route for finding out specifics - they can tell you everything from light cycles to specific UV ranges that cannabis likes most, which can give you a general understanding to base your plant growth off of for good plant growth
i would also suggest some kind of reflective material near the plants, some people use a white wall and some use mylar or some similarly high reflective material
i only ever use lights for sprouts and may use one for oyster and shitake mushrooms this year but have little persoanl experience of using artificial lighting for growing plants
Craig Dobbelyu wrote:If you are only trying to overwinter them so that you can plant them out in the spring again, perhaps it would be more economical to mimic the plant's natural winter conditions. In other words, instead if trying to keep them growing like it was summer, attempt to make them hibernate. You could run a full spectrum light for eight hours a day in a cool 45-50F green house and keep the watering to a minimum (barely moist). In this configuration the plants will not need as much nutrient or attention. Some plants need a cool season to maintain healthy growth in the next year anyway. In any case the florescent light isn't providing the proper light spectrum so the plants aren't able to make use of the nutrient in the soil. That might be part of your discoloration issue.