Lighting is great for the set-up you have. If it hasn't been too long you should separate the 2 plants and give them each their own pot. I would start with a medium sized pot and graduate to a larger after you notice slowed growth. But what you have now will be fine as long as you can separate the 2. They may be fighting each other for the nutrients. If you have an oscillating fan you could use to circulate the air over and thru the plant. The wind also helps strengthen the stock.

Lemme know if you have any other questions.