This is THE important factor to get right to successfully raise and bloom orchids.
Correct light is important for proper plant growth.
You can usually judge how much light an orchid needs by watching the leaves. You want the leaves to be a light grass green. In correct light, some plants will produce a pigment that resemble plum colored freckles or suntan. This shows that the plant has as much light as it can stand and is trying to protect itself from burning. This is an almost ideal situation for good blooming.