For p/n LHUV-0385-0200 and LHUV-0405-0600 I am seeing a secondary emission centered at approx. 560nm. Anyone else seeing this?
I have no answer but do have a question: have you been able to tell whether this is an actual LED die emission or whether it might be due to some luminescent material that is being excited by the principal emission? How have you gone about assessing the 560 nm emission you've observed? If it is sourced by the die, the spatial distribution of the 560 nm emission would be more similar to that of the principal emission, while if it arose elsewhere it would likely have a different distribution.