Miltoniopsis grow in areas in South America where temps don't usually go above 80 degrees during the day and temps around 55-58 degrees at night.  Try to keep plants cooler in summer by potting in small clay pots.  Keep moint to encourage evaporative cooling at root zone.  Ususall 1200-1500 ft candles of light during summer but may be increased during winter months when cooler temps prevail.  Best left undisturbed for a few years as they resist repotting.  Milts are light sensitive and bloom best in May-June when days are longer and light is brighter.  Low concentrations of fertilizer are best as roots seem to be sensitive to salts.