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wanggang10:1.用1W LED (90lm)做一個(gè)手電,在2M處中心照度要達(dá)到4000lux ANNfL9:Jy 2.光斑大小要10cm n{dl-P 3反光杯深度<60mm ,口徑<50mm 28u)q2s^W| 我不知能否實(shí)現(xiàn),請(qǐng)各位高手幫忙指點(diǎn),最好能提供您的計(jì)算方法,非常感謝!(2009-04-22 15:08)嬀/color] (Yz EsY
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