Do I have enough light?

[elibrown81]

I'm sure that this is an extremely common question, but I didn't readily find a detailed answer. I currently have 4 orchids-One Paph one Aliceara and one Miltonidium and one that I think is an oncidium var, but with out a bloom I am a bit unsure. They sit next to a 6 foot by 6 foot east facing window. However, being in Spokane, Washington the sun in the winter and early spring is very far south, and I don't get much, if any sunlight. So, this winter I purchased a floor lamp, partly for decor and partly for the Orchids. It has three 45w incandescent bulbs at different heights. Are these lights doing any good for my orchids, or are they just "dressing-up" my living room? Follow up question- what is the preferred set-up for those of an economical leaning? (read: cheap)