Segundo o fabricante, com este novo tipo de reflectores a intensidade da calha pode aumentar até 45%.

A informação retirada do site da Ecotech - Radion TIR Lens Kit now available
What is TIR?
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% beneath the fixture without sacrificing spread[1] or consuming additional power.
Put Your PAR Where Your Tank Is
On the Left is a Radion using the current lens and reflector. On the Right is a Radion using the new TIR lens kit. Readings where taken over a 30×30 inch area at 12 inches from the light.

As Promised…
While many make claims – EcoTech delivers. The TIR lens incorporates EcoTech’s ongoing commitment to innovation and improvement for the benefit of its customers. A modular upgrade for a truly modular fixture makes the Radion an ever brighter solution for aquarium lighting. For an independent comparison of the standard reflector vs. TIR lens, be sure to check out Advanced Aquarists hands-on reviewAdvanced Aquarists hands-on review.
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% beneath the fixture without sacrificing spread[1] or consuming additional power.
Put Your PAR Where Your Tank Is
On the Left is a Radion using the current lens and reflector. On the Right is a Radion using the new TIR lens kit. Readings where taken over a 30×30 inch area at 12 inches from the light.

As Promised…
While many make claims – EcoTech delivers. The TIR lens incorporates EcoTech’s ongoing commitment to innovation and improvement for the benefit of its customers. A modular upgrade for a truly modular fixture makes the Radion an ever brighter solution for aquarium lighting. For an independent comparison of the standard reflector vs. TIR lens, be sure to check out Advanced Aquarists hands-on reviewAdvanced Aquarists hands-on review.
E por fim, um vídeo tutorial a demonstrar como trocar os respectivos reflectores - para quem tem o modelo antigo