Relying solely on lights - advice for my next setup?

[Ross]

Calvin, a 4' (nomial) 4 tube t5 fixture will produce over 2000 foot-candles 10" away. I am growing Dendrobium and Maxillaria and Angraecum at approx 12" or 1900 foot-candles. I think you'll be fine with a four foot four tube fixture. I personally like the New Wave brand. I also have a Sunblaze44 and it doesn't seem to put out as much light (different type reflector)