UV-CFL lamps are used to cure gels. They emit a lightly broader range of UV light wavelength than the newer UV LED lights and work more slowly.
Required Reading
February 19, 2013
UV nail lamps do not appear to significantly increase the lifetime risk of keratinocyte carcinoma — a type of non-melanoma skin cancer — in consumers, reports a study published in the Journal of Investigative Dermatology.