Mercury vapor lamp ballasts are similar to the ballasts used with fluorescent lamps. Ultraviolet radiation from compact fluorescent lamps may exacerbate symptoms in photosensitive individuals. High-pressure lamps are much more similar to HID lamps than fluorescent lamps. Aluminium oxide is also used in preparation of coating suspensions in compact fluorescent lamps. The ballast of fluorescent lamps can make a buzzing sound. Cerium is also an essential component of phosphors used in TV screens and fluorescent lamps. Currently, relatively little is known about the functional significance of fluorescence and fluorescent proteins. Used in high end electronic fluorescent ballasts. LED tube lights are designed to physically fit in fixtures intended for fluorescent tubes. This is a method analogous to the way fluorescent lamps work. A ballast is needed to run these types of fluorescent lights. Hoechst stains are part of a family of blue fluorescent dyes used to stain DNA. Some people have concerns about the health effects of fluorescent lamps. Compton was intrigued by the possibilities of the research there into fluorescent lamps. It is also used in fluorescent lighting.