Question: do uvb bulbs produce uva?
Answer: The difference between UVB and UVA is made by the difference in wavelengths and the energy in the photons of the light. UVA also has a longer wavelength than UVB does. ... UV bulbs provide both UVA and UVB. When it comes to purchasing a UV Bulb, make sure it has full spectrum lighting and produces at least 1.1% UVB.