Lighting for my Phals

[kagura]

I have a pretty big problem when it comes to growing my 'chids. Ever window in my home is north facing except for one in my room which is north-west facing. So artificial lighting is a must for me. But I am so confused on what would be needed for them to thrive. I don't have much space in here (Rooms only 8x12). The 'chids are on a shelf and I was wondering about the range of lighting for phals, paphs, and, dends . Because paphs and dends are the next orchids on my list. I am also on a serious budget (I don't have to eat but I gotta have electricity and water for my 'chids ). So what would be good lights for me to get that aren't going to burn a hole in my pockets? And also what kind of light cycle do I need to be keeping them on, because I was going to put the lights on a timer.

Thanks for everyones