One of the seven streams of force of the Logos; the seven great lights. Each of them is the embodiment of a great cosmic entity. The seven Rays can be divided into the three Rays of Aspect and the four Rays of Attribute, as follows: Rays of Aspect: The Ray of Will, or Power. The Ray of Love-Wisdom. The Ray of Activity or Adaptability.  Rays of Attribute: The Ray of Harmony, Beauty, Art, or Unity. The Ray of Concrete Knowledge or Science. The Ray of Abstract Idealism or Devotion. The Ray of Ceremonial Magic, or Law. The above names are simply some chosen from among many, and embody the different aspects of force by means of which the Logos manifests.
(Theosophy) One of seven streams or chanels of force, or emanations, from the Logos; the seven qualities of God expressing individualized attributres of divine nature. Each bequeaths its quality, color, and sound as it impacts consciousness. The seven Rays are divided into three major Rays of aspect and four minor Rays of attribute. The Rulers, or Chohans, of the Rays are also known as Seven Spirits, or Elder Brothers before the Throne, or (in Eastern thought) Seven Great Rishis. They are:I-will, power (red); II-love, wisdom (blue); III-intelligence (yellow); IV-art, harmony, beauty (green); V-scientific understanding (orange); VI-devotion (indigo or rose); VII-ceremonial order (purple).
One of the seven streams of force from cosmic sources that enter our solar system and condition all life within it, including all the kingdoms of nature on Earth. The planets in the solar system are really the "vehicles" that pass this energy on. Each individual has their own "ray make-up".