All my LEDs are lower on the kelin scale. This should greatly reduce or completely eliminate the UV radiation. Kelvin is directly related to the wavelength of the light, at least as I understand. You can put blue filters over a low Kelvin light, but it doesn't add any more uv to the output. Nearly all my LED lighting is 2800 Kelvin, withone or two leftover, lower lumen 4,000 K lamps.
Summary from a more technical site on LED levels.
"Both cool and warm white LEDs can be built from blue LEDs + luminescent material or UV LEDs + luminescent material.
Those made from blue LEDs are in the far majority because they are much cheaper. Their UV emission is zero. The problem with these is the luminescent material is aging and so they are getting bluer with time, because a higher fraction of the light is passing the luminescent material unaltered.
Those made from UV LEDs don't have that aging problem because all light passing the luminescent material unaltered is invisible. They are only getting darker with time. So, yes, these LEDs do emit UV. And they are not cheaper but more pricey because of their better color stability over time.
BUT, in a light bulb there is a glass in front of the LEDs. And ordinary glass filters UV nearly perfectly. (You can't get a suntan behind a window.) That's the same as for CFLs. If you need the UV, e.g. in a solarium lamp, the CFLs or LEDs need to use quartz glass or a transparent plastic for the casing." https://electronics.stackexchange.co...-emit-uv-light
The author recommends using only higher quality Phillips and CREE LED bulbs, which do use the blue emmitting diodes, but with a coating over them to absorb the blue. The higher quality bulbs have a longer lasting coating, and if they're glass encased, there isn't any significant UV output. You would need a color temperature meter to assess the presence of UV light, and not all CT meters will detect UV.
Blue light has gotten a lot of attention in the world of vision care. This is blue light, far below the UV range where the energy levels that strike the clear tissues of the cornea and the brain tissue that makes up the key layers of the retina. But blue light is associated with sleeplessness, and lowered blinking rate, which means dry, aching eyes. Air conditioning and heating also drys out eyes, so I'd be careful about blaming the UV, since it is very far above the blue spectrum. This would be particularly important if you are exposed for many hours to bluish LED light.
I have very little visual fatigue from lights, but using a computer drastically reduces blink rate, which drys out the oil component of tears, which is what is supposed to keep the eyeball moist. The oil comes from tiny glands along the edge of the eyelid. As people age, these glands attract a tiny parasite that takes some effort to get rid of, and that is present in nearly all people in their 60s and 70s. They're called Dermodex and here's a definition: "Demodex is a genus of tiny mites that live in or near hair follicles of mammals. Around 65 species of Demodex are known. Two species live on humans: Demodex folliculorum and Demodex brevis, both frequently referred to as eyelash mites." --Wikipedia
Treating dermodex is done using a very dilute solution of Tea Tree oil. DO NOT MAKE YOUR OWN!!!
, get a commercial product from your optometrist or ophthalmologist. Here's a video, and then a picture of these mites. Before you blame UV, check for these tiny mites. In the video, some of the debris is Dermodex poop.