So I'm thinking about upgrading to HID lights. I currently am growing
orchids in a spare room, and it gets some natural light. I currently
have 4 flor tubes over a table full of orchids.

I'm thinking a 250 would do it, but the cost of a 400 is not that much
more. The theory being that I could move the light higher above the
plants and disperse the light further, therefore more plants. Any
experiences with HID lights for your garden?

Thanks...