good observation
there are several factors in play
1st, technically, the reading on my meter, when measuring Red, should be increased by 62%. I did not do that, as it adds complexity that I did not want to discuss too soon. Now that you bring it up, consider 42 lumens of red is roughtly equivalent to 68 lumens of white. That accounts for your correct observation that red looks brighter than the lumens straight off my meter calibrated for white light.
Another factor is the size of the head. My meter underestimates the output of small sofirn AAA…
these variables are part of the complexity, that a deeper study of Red light will encompass.
These two lights have almost the same output, on my meter… both are on maximum…
(again bear in mind my meter underestimates the small lights, but in this case, both are the same size… for example, the C01S is actually supposed to be making 100 lumens on an intergrating tube)… I think the red does look brighter than the C01S, despite what the meter reading would suggest.
Since I am experimenting with Red Light Therapy on my eyes, for me the important thing is to not use Red that is more than 40% the brightness of noonday sun. I believe staying below 20 lumens of red on my meter, unadjusted for spectrum differences, is similar to the level used in the vision study. So I use medium on my C01R.
Marc E great photos and info, thanks
great option, thanks for sharing info and photos
I do think a pebbled optic, with a nice diffused beam, would be a nice option… depends what we use the light for. Certainly the focused red beam works very well for seeing across a room, while the diffused beam is more suited for close use, at arms length.
choices vary by application…
me too!
Instant cult classic here :+1:
and I like the stock beam too… because the hotspot is wider than on my Tool/Maratac aaa reflector lights