Join Date: Apr 2004
Location: Magog, "french" Quebec, Canada
If it is an oncidium, you can go as close as 2 feet, after a few weeks, if the leaves dont get brownish, you could move it a bit closer.
Three thing to remember to get those orchid to flower, 1) night temp should be colder than day, I guess with light out at night in a vivarium, it should be enough. 2) you need good vent because of the vivarium, check for rot at base of the plant. 3) From my experience, did'nt have much success with MH lighting alone for flowering, the leave will be real nice, but to induce flowering, I guess you might need more yellow light... with orchid, you always get better result with Sodium lamp, so you might want to consider adding one or at least adding a fluorecent with a lot a yellow specter.
125g amazonian on setup phase