Growing, not blooming. Light? Fertilizer? Water? Humidity?

[maelstrom mike]

Alright, I'm hoping for the sake of my orchids that somebody can help me figure out what to do to get these babies back into action.
I have been growing orchids for a few years... well trying to, haha. I have had no luck ever getting them to bloom. I have a huge big on orchids by Ortho that doesn't seem to help me figure out what to do right so I'm open for anything. I'll even take pictures and attach them.

So where do I start. I have an indoor greenhouse- 6'T x 3'W x 1.5'D. This has a plastic cover and shelves, you'll see it in the a picture. I use four GE Plant & Aquarium Ecolux, Wide spectrum 20W Hg bulbs. I started upping the hours a couple months ago. They're at 14 hrs a day right now, on at 8AM, off at 10PM. There is a tupperware tub in the bottom filled with water and a small ultrasonic mister in it that runs from 8AM to 10AM each day. It keeps the humidity relatively close to rainfall, I'd say. I only recently started spraying them with fertilizer water about twice a week. The thing is they all keep growing but none bloom! I don't know if they're not getting the right kind of light or enough fertilizer or what! I'm a poor college student so I'm trying to save some money. I'm seriously thinking about spending the cash just to get some semi-hydro medium, that primeagra that Ray sells (I think that's what it's called). Hopefully that would help with the shrivelled psuedobulbs. I'm not sure what's wrong. Maybe I have the fertilizer/ watering/ and lighting off for correct seasons... it's been such a mystery.

If anybody has any ideas or think they know what the problem could be, please help! Plants are listed below:

-Sedirea japonica
-Angraecum Florulentum (The Easy Blooming Angraecum) -Oh the Irony
-Oncidium "Gower Ramsey" (something like "rising sun")
-(noble) Dendrobium "Dream Ace"
-Unknown hydribd Dendrobium

If you need to know anything else if you're onto something, let me know.

Okay... can't attach pictures, they're too big.

Thanks,
Mike