科锐cob光源3-7w 美国CREE CXB 9v 18v 36V发光面8mm CXA1304灯珠 ¥4.50 CREE发光面17mm 16-25w 科锐cob光源 CXB CXA1816 ¥12.50 科瑞cob灯珠20-35w CXB1820 CREE发光面14mm CXA1820 ¥14.50 原包装CREE cob光源18V发光面11mm 科锐cob灯珠7-12w CXB CXA1507 ¥6.50 科瑞COB灯珠40-50w CXB CREE发光面17mm CXA1830 ¥22.00 美国科锐cob芯片30-50w CREE发光面20mm CXB CXA2530 ¥24.00