Does a blacklight have more uv than a 100watt incandescent bulb?

That will depend on the wattage and type of the black light. If the black light is the incandescent type, then the UV output will be the same as a regular bulb of the same wattage because incandescent black lights don't produce more UV, they just emit less of the rest of the spectrum. In the case of tube style black lights, they do emit more UV than same-watt regular incandescent bulbs, primarily because fluorescent lights are more energy-efficient and can produce more light than their incandescent counterparts.

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