Thanks for your suggestions! I am planning to buy the individual tubes with ballasts and hook them together, so I can add or take away tubes when I need them. The shelf is 18 inches wide, I think it can host a 4 tube unit easily.
My primary concern is my phrags and miltoniopsis. The shelf is only 18 inches high, and the plants themselves are easily over 1 ft tall, so they will be within 5-6 inches of the tube. Will they burn under 4 tubes? I do plan to install at least a fan on each shelf to keep things cooler, although I am not sure how hot the t5 tubes will get.
Thanks again!
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