Hello Deborah...
As Debbie, Candy and other members mentioned above that double fluorescent light, 4 feet long will be good lighting but 2 double lights will be much better for that room size, i always like to mentioned and advise that full spectrum light must be :
at least 5000 K and 91 CRI.
I use 6500 K (Kelvin) and 98 CRI (color rendering index) which is the highest found in a fluorescent light, its the best for birds health .
Also this type of light will control the young's sex before the eggs hatch, i use the :
(1) 6500 k -98 CRI light to make my canaries produce males more than females .
(2) 5000 k - 91 CRI the chance is equal males and females .
(3) Black fluorescent light is absolutely will make them produce females more than males (less than 5000 k -91 CRI) .
The more light they receive is better as long as its installed two feet away from the cages not closer than that, rather than that it will be a big disturbing for their visions.
For more info about this subject visit page Canary new discovery .
Good luck .
Dean K.