(SST-20) Deep Red (660 nm) is the one I want.Red Light options tend to fall into two colors, the more orange but higher output 620nm lights, and the more Ruby Red 660nm lights, also called Deep Red and Photo Red.
I have seen the ~620 nm, which I didn't know was only 620 nm at the time (Convoy L21B, CSLNM1.23). That was purchased for a friend, but looked way too Orange to us both. It also had only one mode by the way. We each wanted to buy a "Red" and Green "lightsabre" thrower. I went with a L21B (KP.CSLPM1.F1), which also was the wrong one - I wanted the pure Green, 525 nm. The KP.CSLPM1.F1 is phosphor converted, as far as I can tell now, and was much whiter than what I wanted. And that one had the advertised 4 modes.
I have still not recieved the Green flashlight I want - the L21A, KT CULPM1.13, I purchased later has the emitter so off-center, the hotspot don't resemble anything that can be called a circle. I have tried loosening the bezel and shake everything into position, but to no avail.
So between lack of knowledge at first, and my bad luck again coming to taunt me, I still haven't obtained the Red light theraphy light I want to try, or the Green lightsabre I want to own for fun. :/
The 850 nm S12 was purchased for a similar purpose as Red light, but it is supposedly penetrating deeper into the skin, helping with deep-tissue, tendon or muscle issues. Having pointed it at my gut, just a few centimetres away, and sat still for some 15 minutes...it feels like that spot of my insides are warming up, but not unpleasantly so. It feels almost like a localized massage taking place inside me.
I really can't say whether it's just a placebo effect, but it felt like it was helping. I have repeated the "treatment" several times, and moved the light around depending on the area I want to try it, and it has always either better or at least never felt worse after some 20 minutes. At that time the S12 gets quite hot to the touch though.
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