I hope for a little continuation within the thread of blue light. I see no reason to open new one though, so allow me to blend into this one.
I got really interested in blue light contribution since I’ve learnt it has more meaning than I first thought.
Just summing up what I’ve learnt so far:
- blue light is the factor that attracts insects. Its lack makes a light neutral for insects (and probably also some other living forms)
- blue light is unhealthy for human: lower melatonine surpression, may favor cancer, may damage eyes
- not sure about its night vision preservance capability
So my first thought was to search for light without content of blue wavelenghts which turned out not to be so easy. So far I’m falling in love with the red light (mainly for above mentioned reasons) since I know it has many advantages. But there are also some other choices. Wiser than me say a warm light contains quite a little of blue but even 2000K contains some. And here’s the question: which white LED would have least blue? What factors decide of amount blue emmited? I think besides the color temperature a tint should have a meaning too?
I’d really like to know if good pretenders (like E21A 2000K, XP-E2 red 620/660, XP-E2 amber, XP-E2 green, XP-L 3000K, SST-20 2700K etc.) are in fact so “blueless” as one might thought.
At least I have two good reasons to search for such led: 1. Insects, 2. good health
Will you contribute your knowledge? Please.
PS: some other posts on blue light:
jon_slider
MontyPyfon
brad
1stein