At one time there was a manufacturing problem with the ReptiSun CFL UVB bulbs so that they emitted unsafe levels of UVB and even UVC rays, which corresponded to health problems like eye problems and burns in reptiles. This manufacturing issue was identified and corrected by the manufacturer several years ago and thus we have not seen problems with it since then unless someone unluckily picked up an older bulb from before correction. The ReptiGlo CFL UVB bulbs were never associated with these harmful effects. The linear ReptiGlo or ReptiSun bulbs have never had any health problems associated with them either. Many people use CFLs successfully now. Linears are better because they cover more area and tend to have more UVB output, but CFLs can be still be used.
