Help! Phals under lights.

[Phal grower]

Just a quick question. I am growing Plals under a two tube 48in. fluoescent with good natural light as well. Anyone have any ideas about how long I should be leaving the lights on? Seasonal changes? Any thoughts would help. Thankyou friends.

[zxyqu]

You have a light meter? Also, what color are the leaves on the phal? Light green leaves is generally better for phals, while lush dark green foliage implies inefficient light (again, generally). Post a pic if you can. P.S. if you have an iphone there is an app called light meter that can measure the light levels, and it's free.

[Oscarman]

12-14 hours is what I aim for. I have played with seasonal changes, but have a variety of orchids and did not really see the benefit to the whole group.