I've been adjusting the length of time for the seasons. In winter I ran the lights (mostly 150 watt 5000k LEDs) for my plants for about 10 hours, and now they're getting 12 or 14 hours, depending on how much the light annoys me in the evening.

My collection ranges from one to five feet tall. The best solution I found is attaching clamp-on work lights to the pole of a defunct torchier, which allows me to put each light at any height up to about six feet. The problem is that I ended up with all the plants clustered around the pole, which wasn't very attractive. I still use the pole for two very low plants and clamp the rest of the fixtures to the edge of a shelf that runs between two of my windows, and arrange the plants the floor, window sills, a very low table, and a somewhat high table, rotating them between the artificial light and the windows when I get more direct light in the summer. The cords look ugly, but fortunately I'm not too picky about aesthetics.

I could find or make another pole or two, but I'd really like to try getting a bunch of architect-style swing arm lamps and mounting their bases on 2 by 2's screwed to a shelf I have between two windows and vertically on the front of the window frames. I think that would give me a lot of flexibility, but I keep balking at the cost.

The Q about plants of differing heights was already answered at your other posts on this issue at C&S Forum where you were told to raise the pots.