When I was actually once bored enough to read thru a lot of inkjet patents, the complexity of ingredients made me absolutely shudder on the
metamerism issues. But that same complexity makes realistically predicting the lifespan of component inks equally complicated. The adolescent
stage of where these neo-bulbs are right now is a bit hard to decipher, as some of the mfg and retailers promoting alleged full-spectrum results
aren't exactly known for their business integrity. Things will gradually improve, but at what pace, and at what effect. The damn things ruin my eyes,
and I don't much care for what they do for print colors either. But I keep testing new varieties from time to time, because that is where things are headed.