As covered in this article about orchids care and light, Cymbidiums need medium to bright light intensity in order to thrive, and do best with as much light as possible. If your Cymbidium orchid is receiving the optimal amount of light the leaves will be a yellow-green color.Too much light will cause the leaves to become yellow, and too little light will cause the leaves to become a very dark green color.ertilizer Requirements. When the Cymbidium is in active growth, you will want to fertilize regularly. An orchid fertilizer solution of (20-20-20) is recommended. During the winter months, applying fertilizer once a month is sufficient.
1. Astronomical Unit-a unit of length used for distances within the solar system; equal to the mean distance between the Earth and the Sun (approximately 93 million miles or 150 million kilometers). AU. astronomy unit-a linear unit used for astronomical distances.
One astronomical unit equals about 150 million kilometers (93 million miles). Another way of looking at it: the astronomical unit is a bit more than 8 light-minutes in distance. Quite by coincidence, the number of astronomical units in one light-year and the number of inches in one mile are virtually the same. For general reference, there are 63,000 astronomical units in one light-year, and 63,000 inches in one mile. This wonderful coincidence enables us to bring the light-year down to Earth.