I want to know the answer to the following question:
Why is efficiency sometimes lost in phosphor-based LEDs?
All the background I'm provided with is that "The design and production of a light source or light fixture using a monochrome emitter with phosphor conversion is simpler and cheaper than a complex RGB system, and the majority of high-intensity white LEDs presently on the market are manufactured using phosphor light conversion.". Is that enough to answer the question?
Answer: no