Cattleya Leaf Color

[Hiester]

This is my C. Tokyo Life after about two weeks under T5 fluorescent lighting at 6500K at a distance of about eighteen inches. The plants do get variable, natural indirect lighting all day long, and maybe a tiny bit of direct sun very, very late in the day. You can see another Cattleya in the center background. The (mostly older) leaves are developing very slight quilting, as if I am not watering enough. I've been watering about every other day. Both plants are sending out strong root growth right now, though leaf growth seems to have slowed. They are both in 3½" net pots.

Does this look normal? OK? Should I be watering every day?