The Cree LR24 series consists of 2x2 architectural lay-ins that are more than capable of replacing a fluorescent fixture while providing a quieter ceiling due to the recessed light engine. A high color rendering index (CRI) number means that colors will appear more accurate with the Cree LR24 than with standard fluorescent bulbs. The LR24 series lay-ins are universal voltage (110-277V) and are capable of being dimmed with a 0-10V DC control.