This is the light I have right now it's easy to add another if it's lacking they just use a little jumper between them.
https://www.sunblasterlighting.com/grow ... r-24-inch/
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You can add as many as you want, but light dissipates in strength the further away from the bulb you get. So my suggestion would be to get the plants raised up some, maybe a false wooden bottom. That way you don't lose the charm of the overall setup. I like the wooden rustic look.
. If you shoot for between 6-8" from the bulb to the top of the pots you should get decent coloring and pretty healthy growth.
One other suggestion would be to add some kind of reflector to focus the light down on the plants. As you can see in the second pic you're losing a lot of light out the front of the setup.
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