Context: There are several types of multi-color white LEDs: di-, tri-, and tetrachromatic white LEDs. Several key factors that play among these different methods, include color stability, color rendering capability, and luminous efficacy. Often, higher efficiency will mean lower color rendering, presenting a trade-off between the luminous efficacy and color rendering. For example, the dichromatic white LEDs have the best luminous efficacy (120 lm/W), but the lowest color rendering capability. However, although tetrachromatic white LEDs have excellent color rendering capability, they often have poor luminous efficacy. Trichromatic white LEDs are in between, having both good luminous efficacy (>70 lm/W) and fair color rendering capability.

Question: What is one type of multi-color white LED?
Answer: tetrachromatic

Question: What is a factor that may be different in the various types of multi-color white LEDs?
Answer: luminous efficacy

Question: Higher efficiency in multi-color white LEDs may mean what?
Answer: lower color rendering

Question: What type has the best luminous efficacy?
Answer: dichromatic white LEDs

Question: What luminous efficacy does trichromatic white LEDs have?
Answer: >70 lm/W

Question: What is one type of solo-color white LED?
Answer: Unanswerable

Question: What is a factor that may be different in the various types of multi-color red LEDs?
Answer: Unanswerable

Question:  Higher efficiency in multi-color white LEDs don't mean what?
Answer: Unanswerable

Question:  What type has the worst luminous efficacy?
Answer: Unanswerable

Question:  What luminous efficacy does non-trichromatic white LEDs have?
Answer: Unanswerable