With all the talk about 670nm deep red led helps eyesight @ 670nm deep red led helps eyesight
Using a 670nm would lead me to get another one or two
Maybe add some blue anodizing for health
Cheers
OS
With all the talk about 670nm deep red led helps eyesight @ 670nm deep red led helps eyesight
Using a 670nm would lead me to get another one or two
Maybe add some blue anodizing for health
Cheers
OS