The Global Demographic Tailwind

[mouton29]

<<Do you know if LED’s emit a measurable amount of UV radiation>>

The spec sheet on the cree website for the LR6 does not say. However, a little internet reading sugests that this is an issue for CFL bulbs, at least those not encased on glass, but not for LEDs. The second of these two links is a website for the Xeroderma Pigmentosum Society, XP is a disease where exposure to UV light can be fatal, so this is a real issue for them.

http://www.toolbase.org/Technology-Inventory/Electrical-Electronics/white-LED-lighting

http://www.xps.org/uvnotes.htm

What about LED lamps?
The LED (Light Emitting Diode) is a solid-state device. The mechanism for producing visible light is different from incandescent lamps, where the light is produced by heating a filament to a white-hot temperature. The LED uses very low power and generally produces light at a single wavelength. The earliest LEDs emitted light only in the infrared portion of the spectrum (opposite UV). Remote control "clickers" are among the best known uses. Then red LEDs came into use (remember early digital displays on the first calculators?). Recent developments have enabled the economic production of larger (thus brighter) LEDs of various colors. In fact a common use is to replace traffic lights, because they are more efficient and last longer (even if more expensive than the 100 watt incandescents they replace). Today we see increasing availability of "white" LEDs. The LEDs I've described thus far are monochromatic, that is they produce light of a single color or wavelength. To produce white light, we need the mix of at least two colors (usually three or more, as in color TV or computer monitor). So white LED's use various "tricks" to create the appearance of white. One of the techniques is to coat a blue LED with a phosphor that emits yellow light, that combined with blue appears white to our eyes.
In any event, if you know the light source include LEDs only, then there will be no UV (A, B, or C) emitted. Your UVA+B meter should read zero. No UVC.
I qualified my statement saying "if you know the source is LED" because the blue-white light emitted from white LEDs appears the same as the tell-tale blue-white light I often caution as being a sign that an unknown light source might be high in UV. If in doubt, use a meter.