Lighting Question for Mini Miniature Tank

[Kaity]

Hello...so i have in my tank shade/low light miniature orchids including lepanthes, pleuros, and a few stelis. My question is how many of these lights should I use if they are 13 inches above the plants? they are Sunblaster 2' 24 watt T5 6500k lights.

[tmaxwell]

Well, I'm not sure how many lumens those put out, but my stelis and lepanthes don't mind higher light from fluorescent. At 13 inches, I'd imagine two would be plenty, just watch leaf color. One may do the job, I've used an single 26w. CFL at about 12 inches with good success for shadier guys.
good growing,
tyler