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长度越长功率越高，USB供电（5V）超过10米容易出现尾端亮度衰减；需要长距离（>15米）优先选插电12V/24V降压恒流款保证均匀亮度

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UnverifiedUSB供电灯串多为5V低压，长度普遍限制在10米以内，超过10米需选220V直插或专用变压器款以避免尾端亮度衰减91% similar Unverified5V USB供电灯带单条超过3米会因电压降导致末端明显变暗，长距离安装应选12V/24V方案，24V灯带单路可稳定驱动10米以上90% similar Unverified灯串越长供电负载越大，USB款超过10米亮度末端衰减明显，电池款超过5米建议分段供电或选低功耗LED89% similar UnverifiedUSB供电（5V）款霓虹灯亮度和尺寸受限，尺寸超过40cm或需要较高亮度时应选12V适配器供电款86% similar UnverifiedUSB供电灯串需搭配充电宝或常开插座才能持续点亮，适合桌面、书架短距离布置；超过10米的大范围布置优先选插电款（220V转低压），避免电压衰减导致末端偏暗86% similar

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