I don't think a spectral distribution curve it's asking too much from a technical lighting company that produces component LED's and publishes that very same information for all those products. I can't tell from your post whether you don't actually know what a spectral output is, or are just saying that other people wouldn't know it. Finally, I'm not sure what you mean by "who is to say the r&d guy didn't know the answer." He didn't say he didn't know it, he said it was proprietary. I'm not angry they wouldn't give it to me, I'm just perplexed by them saying it was proprietary. By the way, since you are relatively new to PF, I should point out that we try to have a welcoming, friendly environment here without people making personal judgments about the psychological state of other posters or telling them to "get over it." If you are more used to a confrontational type of forum, perhaps somewhere else would be better suited to your requirements.