The Seven Rays
Seven great energies or streams of force demonstrate the qualities of Deity.
The Wisdom Teachings speak of them as the Seven Rays and they are
dominant conditioning and qualifying factors in our lives. But not only this;
they are, we understand, cosmic elements, reaching us from the unknown
spheres of other systems, and no part of the life of our planet is unaffected
by them.
In the same way as the seven colours are parts of the spectrum and the
seven notes are tones of the octave, so these Rays are differentiations or
qualities of the one divine Emanation. In some of the eastern teachings
they are called the seven breaths giving life to all forms, and they have
been referred to in various ways in different philosophies. It is these great
"Energies" that St John called symbolically "the Seven Spirits before the
throne of God."
The Seven Rays, each carrying particular qualities and tendencies, are
responsible for the different psychological types. Several Rays will probably
influence us, but one usually predominates and gives the main colouring to
our character. There is a connection here with astrology ... the astrological
influences carry these same streams of energy and our alignment with
particular Signs puts us more directly in touch with these qualities.
THE SEVEN RAYS
"The Hindus speak of them as the "Seven Praj patis" (Lords of
Creation); the Zoroastrians, as the "Seven Amesha Spentas"
(Immortal Holy Ones). In Egypt they were termed the "Seven
Mystery Gods." The Jews call them the "Seven Sephiroth". In
the Christian Bible they are referred to as the "Seven Spirits
before the Throne of God". In the Theosophical concept the
term "Seven Planetary Chain Logoi" is generally used."
Space, Time and Self by E. Norman Pearson. (p.70-71.)
Each of the seven great rays of creation represents a particular learning lesson for
our embodiment on the Earth. We have now entered an accelerated phase of our
evolution in which it will be important for each of us to integrate the aspects of all
seven great rays. We may call upon the assistance of the Archangel charged with
responsibility for the particular ray. It is also helpful to work with the color of each
ray. Visualize the color or wear the color.
You will be given much background about the 7 Rays that we all live including the history... you will also be given the information for how to call down by invocation the power of the seven rays into yourself and how to use them personally and how to work with the rays in a healing aspect for both yourself and others by being given clear instructions for visualization for yourself, others and situations...
attunement to a previous system is not necessary
however, it does make it easier to channel the energies for others 
this isn't a 'hard' or 'large' system to learn
just a LOT of information so that you may fully understand and grasp the concepts and beingness of the chakras and how to work with them and use them in helping yourself and others!!
I offer fast online support and do my best to answer all questions promptly and fully and will always be available to you as you learn and work your way into mastery