Lightting for phally flasks any suggestions

[Aussie02478]

Hello everyone,
Just looking to see about some lighting for a new flask room that i just built.
there is no light that enters from outside it is 2.5 m by
2.5 m, walls are 70mm thick with styroboard fill,stay at a constant 24 degrees..
At present i have 90 mother flasks and they are all doing very well. Although there are 2 or 3 that are going a bit discoloured. I am only useing normal 4foot fluro cool white tubes .
Dose stacking flask make a differance to them.
was wondering what other people out there are useing and i thought it would be interesting post

[CodiMN]

I just got a book yesterday printed by the AOS about lighting. I don't have any flasks, BUT there's a mention of cool-white flourescent blulbs "give bright light without danger of burning orchid seedlings." Growing Orchids Under Lights by Charles Marden Fitch, p. 45