[PhalPal]

If lighting is your problem for lack of blooms and the bulbs are placed close enough to the plants, then theoretically, I would say yes. For instance, Cymbidiums like outdoor light at about 6-8,000 fc and just don't do well indoors. LOTS of other variables come into play when orchids won't bloom, but adding more light is the first thing I would think of if the plant is otherwise healthy and growing in good culture.
I would get two warm bulbs and two cool bulbs; this will cover the spectrum used the most by orchids.

button - my light bank is four feet long and 10 inches wide. It sounds like a small amount of space, but I have a cork board hanging on the wall 11" away from the side of the reflector with mounts hanging on it. I have Phals, Tolumnia and Catts with new growth and/or spikes on all of them, so the light is reaching pretty far to the sides. My higher light orchids go directly underneath the lights, lower light needs are to the side of the lights. There are pictures in the 'Growing Spaces' thread of my set-up and many others.

WARNING!!! If your orchids are used to natural light, be careful to introduce them slowly to your T5's. I burned quite a few leaves and set some plants back by burning them. They are really intense and this is where having a light meter would come in very handy.

When both of you get your new lights set up, make sure to take pictures and post them in the Growing Spaces thread. It is very helpful as well as interesting to see how other growers work around our obstacles. (either space or financial!)