I am new to this community and have already made my way through the 6 page ChipZero-affair. A frustrating matter indeed.
Back to the question:
I am looking for a flashlight or - if it has to be - a battery rear light for bikes - that emits a - what i can only call - a true red of 640nm or more - the higher the better.
I have been looking all over the place for days (google, youtube, contacted manufacturers), but so far without luck. Maybe the only solution will be a custom flashlight. Any advice would be much appreciated.