homemade LLLT system questions

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How durable are the azix 650nm 5mw diodes? How sensitive are they to static electricity? How sensitive are they to slight fluctuations in electrical current/voltage? How long will they function before burning out?

How likely is it that they will not completely burn out, but will become damaged and project a beam more similar to an LED than a laser diode?

Should I dissipate extra voltage/current to ground running it through a resistor?

Has anyone been able to (or attempted to) find the power loss of the laser beam over distance in standard conditions?

I have heard seen the power estimates of 3-6J/cm^2, but I have not yet seen which studies the estimates came from. I have access to most major scientific journals and research articals, so I would be able to look at the specifics of nearly any study. I would like to see exactly where the estimates came from and if they are based on animal or human models, how effectiveness was measured etc

The 40,000 dollar machine only uses 107 diodes, and it appears to be at a distance greater than 1.5cm (angle of incidence appears to still be approximately 90 degrees), which would dissipate the power further relative to OMG design. At that price, the manufacturers are more concerned about reputation rather than making a relatively small amount more on each machine, so why is the power lower???

Is there anywhere I can get the unfocused laser diodes with a lense to control the amount of dispersion of the beam?
 
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