1.9W/cm2 and a short wave UV output of 2.9W/cm2.
Incandescent lights (the kind Edison invented) don't make much UV. They do use a lot of energy (compared to fluorescent), and over half of it comes out as heat. Nobody has invented a fluorescent light that gives out white light. They did have one that gave off UV. All fluorescent lights emit a small amount of ultraviolet, which is generally not considered harmful. It's less than sunlight. There are some special bulbs that reduce UV to a very low level. They're expensive, and not necessary in most circumstances With virtually no UV emissions, LEDs do not attract bugs, and that’s made them popular in commercial food-service applications, residential kitchens, and exterior installations where it’s important to minimize the attraction of small flying pests. LEDs offer relief from another pesky problem—insects. UV light attracts insects. If you’ve ever seen—and heard—a black-light bug zapper at work, you know the strange command UV radiation seems to hold over insects. In all fluorescent bulbs, an electric current in a low-pressure mercury vapor produces ultraviolet light. The UV strikes a phosphor coating on the inside of the bulb, which emits white light by fluorescence.  Following is some helpful information on UV rays and alternatives to the problem. Light Emitting Diodes. LEDs (Light Emitting Diodes) do not generate UV radiation because they are lit through a process which involves electrical current flowing to semiconductors. Unlike incandescent and CFL bulbs, LED bulbs do not require a filament or gasses which use heat as the source of light. While there is a slight amount of heat that is generated, it is not in the infrared or ultraviolet portions of the light spectrum. Many people do not have a choice as to whether or not they will be exposed to UV radiation as a result of fluorescent lighting. In some cases, these lights are used at their place of work. There are steps a person can take to help minimize the exposure they received to UV radiation. Some industry sources claim that LEDs produce no UV radiation. This actually isn’t true. LEDs do produce a small amount of UV, but they emit even less. That’s because the amount that is produced is converted to white light by the phosphors inside the lamp. LEDs offer relief from another pesky problem—insects. UV light attracts insects. If you’ve ever seen—and heard—a black-light bug zapper at work, you know the strange command UV radiation seems to hold over insects. Their warm white LEDs show even worse results, a peak output of 1.9W/cm2 and a short wave UV output of 2.9W/cm2. The bottom line is that these fixtures put out as much UV as they do blue light. All LEDs also emit IR. As a matter of fact, heat dissipation is a major factor in LED design and LED life. Regardless, there is big difference between no long wave UV and no UV at all. (That's why the government sets UVB filtering standards for sunglasses.) The photo above shows a UVX Radiometer using a 200nm-300nm head (UVB and UVC) in the actual testing of a major brand white LED luminaire. UV LED curable inks cost, on average, twice as much as traditional UV curable inks. LEDs do not produce ozone gas with use while conventional mercury lamps do. Although LED curing uses 20% of the energy for emitting UV light, it produces more heat within the device.  Notice that the UV output matches the intensity of the LED visible light output. Notice, too, that the IR output matches that of a steam radiator. To be fair, we found no measurable UV in the long wave 300-380nm range. That this is the only UV that most museum quality UV meters measure may just be a coincidence. Regardless, there is big difference between no long wave UV and no UV at all. (That's why the government sets UVB filtering standards for sunglasses.) The photo above shows a UVX Radiometer using a 200nm-300nm head (UVB and UVC) in the actual testing of a major brand white LED luminaire.
https://answers.yahoo.com/question/index?qid=20080408123231AAAkLGd http://www.leapfroglighting.com/lighting_and_uv_radiation/ http://classroom.synonym.com/light-bulbs-not-emit-uv-radiation-15925.html http://www.ledlights.org/FAQ/Do-LED-Lights-Emit-UV.html http://www.leapfroglighting.com/lighting_and_uv_radiation/ http://www.nouvir.com/index.cfm?ref=90200&ref2=9 https://en.wikipedia.org/wiki/UV_LED_Curing http://www.nouvir.com/index.cfm?ref=90200&ref2=9
how much uv do leds emit