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TIR lens
1. Lens TIR lens: its advantage is high luminous efficiency. 2. FRESNEL Fresnel lens: the light output is consistent and uniform, and the light type is beautiful, but the light efficiency is particularly low, generally only 60% to 70%. 3. TIR+FRESNEL lens: It combines the advantages of both, not only has beautiful light shape, but also can achieve 90% light efficiency.
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