It is very hard to decide to buy procyon and proteus,since many article said proteus is brighter than procyon,and brighter is better,if in this case,there is no reason to spend more 100$ to buy procyon.
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It is very hard to decide to buy procyon and proteus,since many article said proteus is brighter than procyon,and brighter is better,if in this case,there is no reason to spend more 100$ to buy procyon.
The Proteus has 2 red and 2 green LEDs per eye. The Procyon glasses initially started at 1 Red, 1 Green, 1 Blue LED per eye. That was at the time that those articles were written. The new Procyon glasses have 1 Red, 2 green, and 3 blue LEDs per eye. The Kasina has the same LED configuration as the new Procyon glasses.
Brightness is a bit more than just the number of LEDs however. It also has to do with 'on' time for LEDs in the modulation and also the values of current limiting resistors. The Proteus uses only square waves for light and is overall a simpler system. Color has no consideration (for the most part). The Proteus has 2 color channels, red and green in the factory configuration. This is sufficient to reproduce AudioStrobe (which is 2 channel) and simple flicker sessions.
With the Procyon, color became a major factor in session design. The Procyon has 3 color channels: Red, Green and Blue. So, onboard sessions began to explore and exploit color effects. This may at times reduce the overall perceived brightness but with much to be gained in the beauty of the color palette and its ability to alter psychological states.
With the introduction of the Kasina, color control came fully into play with SpectraStrobe technology. The Kasina has 6 color channels: Red, Green and Blue for each eye. SpectraStrobe allows precise control of all of these channels. The new balance of LEDs for the Kasina and Procyon was found to be an ideal one to bring the Red LEDs, which transmit through the eyelids much more easily than other colors. into balance with Blue and Green.
Again, on the Kasina, some measure of brightness has been sacrificed to achieve a broader range of subtle colors. It is a fair trade-off. When the eyes adjust to brightness levels (night vision for instance) then the stimulation levels are very similar but with a wider palette.
About the 'on' time for LEDs mentioned above. The Procyon has the ability to also create sine waves and triangular waves for light control. These can be smoother with less harmonics present. The Kasina has the ability to utilize any possible wave form that can be used to modulate audio. (this is true for AudioStrobe on the Proteus/Procyon too but without the color control)
So, in summary, I would say that the referenced articles do not consider the LED configurations on the newest releases. And the choice comes down to the amount of color channels (preference for exploring the spectrum) and the technology that delivers the light. Proteus sessions as far as parameters are simple. Procyon sessions can be very complex. Kasina sessions, the sky is the limit. The Kasina also has many more modern features including onboard mp3 audio, leading software support, etc.
Hope this helps,
Scott