In Pennsylvania, only employers of seasonal farmworkers are required to provide breaks. These employers must give employees a 30-minute break after five hours of work, during which employees must be relieved of all duties. This time may be unpaid. All other Pennsylvania employers have no obligation to provide either meal or rest breaks.
Overview. 1  A cold cathode fluorescent lamp (CCFL) is a lighting system that uses two phenomena: electron discharge and fluorescence. CCFLs are mainly used as light sources for backlights, because they are smaller and have longer lifetimes than ordinary fluorescent lamps.
How to tell the backlight type of your notebook display? Essentially there are two types of backlights currently on the market: - LED (newer technology) - CCFL (older technology) It is extremely important to know your original screen backlight type as they are not interchangeable. CCFL backlit screens typically have two extra wires, white and pink, sometimes green and blue, that connect to a high voltage inverter which provides high voltage power to the tube light hidden with-in the screen.