LOL. If you need higher power than the C01R (for muscles?), you can buy a triple XP-E2 P60 660nm or 730nm drop-in for $17 on Kaidomain, and their P60 host and battery for $12 extra.
Oh yes you are right about that, now i see what you were talking about.
i never looked into this before so i decided to do some testing to measure. With a stiff supply at 4.5V, the current of a cheapo 9x5mm white LED flashlight was about 260mA, but with AAA cells it never got that high using either old or brand spanking new cells.
i soldered some leads to measure Cell voltage and a fat wire to carry the tail current, and used 2 meters, so this should be some good test data. The Deep Red LEDs would have similar behaviour in one of these 9x5’s although the values may be different, but it does appear that the AAA alkaleaks are the limiting factor in these type of lights.
Hi.
I did what you said and it works.Even the light of the bigger light is not annoying at all bouncing on a white ceiling with all the other lights off.
Thanks for the tip! I wanted to buy a 730nm far red flashlight, but I couldn’t find any for sale. I bought the triple XP-E2 Far Red 730nm P60 drop-in module with KDLITKER E6 host for $22.99.
I found this 1 week old review for KDLITKER E6 triple XP-E2:
i aimed my light meter at the Sun around 4:30 and got a max reading of about 71000 lux.
It has a spectral response peak around 555nm and in the back of the manual has a conversion table for luminous flux (visible) to radiant power of 1 lumen = 1.464mW at 555nm.
Using this ratio, 40mW is 27.3 lumens at 555, which is not far off from your “29”
Im having fun using a 20 lumen red light for sore hiking muscles and joints, and cuts and bruises, from walking into tree branches I did not see :person_facepalming:
Subjectively i felt energized after using this light and it was quite refreshing.
i can “see” the light thru the eyelids and moved it around to shine in from all angles. The apparent intensity would seem to vary by angle also.
What was unexpected was “seeing” an increased intensity of the light from the extreme sides, either by moving the light to the side or by rolling the eye to the side with the light held in front.
Maybe some rods and cones are being excited that don’t normally get much activity?
It would interesting to hear from others if rolling the eye or varying the light angle produces any similar sensations—maybe we can do our own little BLF experiment.
What is interesting is that with my eyes closed, shined the red light directly, you will see "bright" light but removing the light away from your eyes and looking right after i didn't get blinding sensation like watching into white light. And it was in the complete darkness. I could still see normally.
The Beamax Lighting Store on Aliexpress still sells some Sofirn C01R. You may also find it on eBay. It’s almost sold out now. The next batch will most likely come with SST20-DR (660nm) for even better performance.
Glad I could help. :-) Actually, there should only be one type of C01R yet, always using Cree‘s XP-E2 photo red (660nm). Sofirn asked me if Luminus‘s SST20-DR (660nm) would be worth trying in the second batch of C01R. I said yes because I expect a slightly better beam with SST20 whereas XP-E2 is slightly smaller, prone to cause small artifacts underneath a TIR lens that suits better to SST20 (see C01S for comparison).
i would be interested in some 5mm LEDs in the 670nm bin, just to build up a 9x5 for testing. Is anyone else interested in a dozen or so? i will investigate the MOQ from the vendor mentioned early in this thread.