The luminous efficiency of radiation (LER) and color rendering index (CRIs) are two key technological parameters of white light-emitting diodes (WLEDs). But there is always a trade-off between them. especially between LER and R9 (the 9th CRI of red color). Therefore. https://www.roneverhart.com/Behringer-UL-1000G2-Wireless-In-Ear-Monitoring-System-US-584-to-608-MHz-p31393/
Realizing white LEDs with high luminous efficiency and high color rendering index by using double green phosphors
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