Hmm.. Basically blue iridium is my favourite lens. It's not mostly offered nowadays in many sport frames. So, only in radars and m frames. Once i came across that radarlock blue iridium (Atlest tha's what the seller claims), i posted it here, but the quality of the pic is not good enough to understand whether it is blue iridium or ice iridium. So, i messaged the seller about this, but no replies whatsoever. I recently bought a blue iridium radar pitch lens from an UK. It's light transmission percentage i think is 26%. whereas my m frame heater blue iridium LT% is 15%.