TIR stands for Total Internal Reflection. By redirecting more of each LED cluster`s output in a usable direction (in your tank), TIR lenses are able to boost peak PAR levels by up to 45% and total (average) PAR levels by up to 23%...
These replacement upgrade lens are designed to increase the spread of the Radion LED fixture to 36" x 36". Can be use with any generation of Radion XR30w LED fixtures. 2 lens per pack.