The east exposure is better because the temperature is lower in the early part of the day when the plant is receiving the greatest amount of light. A south window is acceptable as long as the sunlight is filtered so as not to burn the plant. Around 1000 foot candles is ideal. There are both warm and cool growing paphs. The cool-growing species are mostly from India and grow at higher elevations.
Complex hybrids are cool-growing and bloom mostly during the winter season.
They will all tolerate the heat of summer as long as they are regularly watered, shaded and kept in humid conditions. The mottled leafed varieties do best in a warmer house or apartment and can often bloom twice a year. It is important to water your paph early in the morning. This insures complete water evaporation on the foliage as well as the crown by nightfall. Water the plant as it approaches dryness.