Examples of LED chips are GaN, InGaN, AlInGaP, GaP, or {HEAD ~ any device} capable of performing {TAIL ~ the stated function} of emitting light in response to an electrical signal 
Examples of LED chips are GaN , InGaN , AlInGaP , GaP , or { HEAD ~ any device } capable of performing { TAIL ~ the stated function } of emitting light in response to an electrical signal
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