You still believe(d) that your (XTE Royal Blue 57% @ 0.35A.) converts
only 43% of P = Vf*If into heat and - that`s NOT CORRECT.
You dream(ed) about a led chip,that doesn`t produce heat - this is NOT POSSIBLE.
I still believe that a led will always produce heat with a min. @ 57% heat efficacy.
43% /100 *57 = 24,51% for your blue XTE and pretty exactly what i measured with my condom.