What's the difference between 635 and 650 if you don't mind me asking?

Obviously you can't be speaking about the colour, what are you referring to?  
The wavelength range between both 635 and 650 is in the red range.


Perhaps I've missed the original question in my emails?


N.


________________________________
From: abel...@atlasnova.com <abela...@atlasnova.com>
Sent: Monday, 20 November 2017 9:15 AM
To: silver-list@eskimo.com
Subject: RE: CS>OT request


The laser pointers that are used for therapeutic purposes of the wavelength of 
635 nm. They are available only from Atlasnova. Make sure you get the 635 nm 
not the 650.

https://www.atlasnova.com/product/atlasnova-635nm-red-laser-pointer/



Sent from Mail<https://go.microsoft.com/fwlink/?LinkId=550986> for Windows 10



From: S Khanna<mailto:khann...@yahoo.com>
Sent: Friday, October 20, 2017 3:54 PM
To: Mike Devour - Silver List<mailto:silver-list@eskimo.com>
Subject: CS>OT request



HI everyone,



I'm wondering if any on this  list have experience with hand held lasers?



I've been researching them and find it a daunting task to say the least!



The ideal would be one with a wide range of application., if the power is 
adjustable.



Thanks,

Sally