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to start relatively quickly and gradually slow down. All such ramps
are linear—that is, straight lines.
Color, mind and mood
Color is known to have a strong effect on mood and conscious-
ness. For example, red light tends to be stimulating and activates
the mind and body, while blue and green light are soothing. For
this reason, pale blue and green light are often used in hospitals and
prisons to help calm the inmates. Yellow light is associated with
"peak performance" activities, and is useful for achieving a relaxed
yet alert state of mind.
Colored light has sometimes also been used therapeutically (though
of course we are not suggesting that you use this system for medi-
cal applications) in the form of color therapies, such as the Luma-
tron® colored strobe system.
Mandala imagery
Most people notice and enjoy the complex, shifting, mandala-like
imagery they see behind their closed eyelids during flicker stimula-
tion. Even single-color flicker stimulation can generate more than
one “virtual” color. But the use of more than one color dramati-
cally enhances this effect, and with all three primary colors now
present, the effect can be remarkably beautiful, helping to transport
you to a splendid inner world.
Red, green and blue light waveforms
Most of the light/sound systems on the market today use a single
visual waveform, the
pulse
waveform. This switches from maxi-
mum brightness to off almost instantly. Although this can induce
more vivid imagery, it can also tire the eyes. In addition to pulse
waveforms, the Procyon also offers pure
sine
(which gently and
smoothly moves from on to off), and
triangle
(which moves more
briskly from on to off) modulation.
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