TYRO G4 luminaires are designed specifically for seamless integration with exposed T lay-in ceiling systems and the G4 generation has specifically evolved into a 30mm deep backlit version to improve uniform surface brightness. The UGR diffuser version restricts glare to the all important UGR19 index recommended by CIBSE for low glare interior lighting solutions, and offers a mightily efficient 170 lumens per watt. A large range of outputs, dimming and emergency options are offered. Please see below for the vast range of variations available for the TYRO G4.