Thanks
Can you share specific examples of no blue light hazard 3000k w high cri?
Eg How are the 3000k High Cri 219c, 219b, sst, lh351, e21a?
Thanks
Can you share specific examples of no blue light hazard 3000k w high cri?
Eg How are the 3000k High Cri 219c, 219b, sst, lh351, e21a?
There are no 3000K with no blue light. Even E21A 2000K has some blue in it but it’s less than incandescent bulbs. Here are some of the warm white LED flashlights I’ve tested. I also tested a bunch of LED strips and light bulbs but I have no idea what emitters some of these use so I’m not going to post them.
I don’t have an incandescent to test but I tested a heat lamp with 100CRI and almost no blue light and 0.000 DUV at 2800K. I think incandescent is similar. SW45K 219B 9080 has very high blue light intensity. I can’t find a 70CRI 4500K to compare with at the moment but it is definitely not a light to shine directly in your eyes. I haven’t tried the SW35 yet. I haven’t tried Optisolis 6500K. I never go above 5000K unless it is for a pure thrower. I measured sunlight from 3000K to 5700K dependin…
How about monochromatic LEDs?
Do they have no blue lenght at all? Red is working great in terms of insects but how about green? Amber?
Now I’m curious.
Do we need to really aim for “no blue” or we just need to produce significantly less blue than whatever your neighbors are using?
Say, my neighbors are using 70 CRI 6500k light while I’m using 90 CRI 5000k. How much less insects I would attract compared to the neighbors? Assuming both they and I operate the light at the same time.
Now I’m curious.
Do we need to really aim for “no blue” or we just need to produce significantly less blue than whatever your neighbors are using?
Say, my neighbors are using 70 CRI 6500k light while I’m using 90 CRI 5000k. How much less insects I would attract compared to the neighbors? Assuming both they and I operate the light at the same time.
I think it’s more about your comfort when walking and holding/wearing a light. It does make a diffrence if you feed like a target for 100 000 bugs, or not. At least this is how this thread started…
You’re right that the diffrence in white light may be neglible at least to those working as blue light+ thru phosphor layer.
There are no 3000K with no blue light. Even E21A 2000K has some blue in it but it’s less than incandescent bulbs.
thanks for sharing your tests
another question
I know that the 4000k N219b is some “medical” flashlights, claim “No Blue Light Hazzard”
I dont know what that means… since as you say, there IS some blue light.
Say, my neighbors are using 70 CRI 6500k light while I’m using 90 CRI 5000k. How much less insects would I attract compared to the neighbors
I suggest you do an experiment with two of your own flashlights… stand them up outdoors, a few feet apart, and watch to see which one attracts more bugs
“I don’t have to run faster than the bear. I just have to run faster than you.”
It’s all relative. 6500K vs 5000K, bugs will go to the former. 5000K vs 2200K, again, bugs will go to the former. 2200K vs monochromatic amber, yet again, bugs will go to the former.
There might still be blue light in X, but as long as X has less blue light than Y, they’ll head on over to Y instead.
I know that the 4000k N219b is some “medical” flashlights, claim “No Blue Light Hazzard”
I dont know what that means… since as you say, there IS some blue light.
It certainly has a blue spike (= not free of blue light hazard) but probably/hopefully limited.
I guess that the more the blue spike curve match the blue light hazard function (curve) the more it is considered to be blue light hazard.
thanks Tally-ho, I like that chart
fwiw, here is a light that claims
“the output has an RG0 rating to eliminate blue-light hazards”
https://www.amazon.com/Nitecore-MT06MD-Flashlight-Batteries-Organizer/dp/B06XCKNFSN
here is a similar light, without the “no blue-light hazzard” marketing spin
https://www.amazon.com/LUMINTOP-Penlight-Rendering-Diagnostic-Waterproof/dp/B07C9XP692/
another question
I know that the 4000k N219b is some “medical” flashlights, claim “No Blue Light Hazzard”
That’s advertisement BS or they have no idea what they talking about. 4000K is very high in blue light content unless it uses a violet pump but violet light is higher energy so it might contain other dangers that we are not yet aware of. 3000K would be the cutoff for acceptable level of blue light IMO. However, I don’t doubt 4000K 219B 9080 makes for a good medical light due to it’s very good color rendering and near BBL tint, and is still a good NW.
One thing I notice is that when I get blasted in the eye by a 2000K, it is less painful and it takes much less time for my eyes to readapt to the darkness than a cooler temp light.
Growing up, I was taught to use an actual yellow or orange incandescent light as a porch or outside door light. This was anecdotally taught and became accepted as fact that the purpose for using such such colored lights was to provide light while not attract bugs, and seemed to work.
When my wife and I bought our house, she just didn’t like the yellow colored bulb above our side door and had me change it out for a normal incandescent lamp.
I did notice a change in the amount flying insects with the change of lamps. Yellow attracted many less insects than white.
One thing I notice is that when I get blasted in the eye by a 2000K, it is less painful and it takes much less time for my eyes to readapt to the darkness than a cooler temp light.
good info
I agree
I suspect moquitoes also become more mellow under yellow light
maybe someone will do a test with a pair of flashlights, a warm and a cool
I look forward to the enlightening results
I somewhat recall reading someone posted on BLF that from their real life experience, the insects would flock to the cooler light and ignore the warmer light but once the cooler light was turned off, the insects would swarm the warmer light. I don’t know what CCT they were.
Night Strategy, cool decoy, warm user
Flyers also targer our breath, especially daytime flyers. , co2 is bait
Smoke is repellant(incense, etc)
A flashlight tailstanding on a picnic table during the day, or a glass of water in sunlight, keeps flies away. They navigate by the sun, additional light sources are repellant (hanging CD’s also repel daytime flies)
For mosquitoes, different species attracted to different wavelengths. There’s a rock solid study about it. I replaced my mosquito and fly zapper UV light tube with 450nm “dephosphored” LED. The intention was to reduce eye strain from the OEM 390nm UV light tube.
Thanks to this thread, I forgot I promised to update the result: very low catch for both mosquitoes and flies. UV wavelenghts still more attractive to them. I killed more night moths than those bloodsuckers, and almost never caught any flies unless they flew drunk.
I bought an insect zapper machine about two years ago. It was rare occasion when I couldn't stand mosquito bites. Seems periodic flooding of the nearest swamp boost the population out of control. The insect killer worked too aggressive, it killed almost all night insects, not just mosquitoes, sometimes small gekkos too. Then I stopped using it because of several reasons: The 40watt UV tube light really hurt my eyes to a point I got a mild headache every time I worked near it. I consider it's a…
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Interesting reads: https://digitalcommons.unl.edu/cgi/viewcontent.cgi?article=2002&context=usdaarsfacpub
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thanks for the link clemence
it says, by my reading, that CO2 is a stronger attractant than lights
Zero light attracts the most, followed by green, which is stronger than IR, which is stronger than blue
and red attracted ZERO
so, to stop mosquitos from finding you, hold your breath, and use Red light
I just want to know how to kill ’em dead.
We recently had a late-night spraying for skeeters. Feh. They just laffed it off and went back to biting in full force.
trap, soda bottle, water sugar, vinegar, or yeast
To keep mosquitoes from ruining a picnic or camping trip, it is nice to have an enticing trap to lure them away from you. This guide is about making a mosquito trap.
add a cool white LED if you like
trap, soda bottle, water sugar, vinegar, or yeast
Making a Mosquito Trap | ThriftyFunadd a cool white LED if you like
Sweaty naked hot human body + panting warm breath is definitely the best bait to summon any mosquito
No lights needed
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