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GB/T 23595.2-2025_Chinese: Test methods of rare earth phosphors for LED - Part 2: Determination of relative brightness (Chinese: LED用稀土荧光粉试验方法 第2部分：相对亮度的测定) Note/Careful: Text of PDF is in Chinese (not English). Delivery (PDF in Chinese): 2 working-hours typically, ASAP English versions: GB/T 23595.2-2025
