灯太亮怎么办？

灯箱的跑边我用的红色和蓝色灯但是蓝色的灯太亮，太抢眼了内容有些看不清了，在不换灯的情况下怎么才能让蓝灯的亮度降低些？

加电阻呀                                         .

加了的但是没用50个灯我加了10K都不行。

再加嘛,测下电流  控制在15MA以下试试

3# 恩知数码

对啊，电流太高也不行啊 ！

从一个旧电器上拆一个可调电阻,比如音量开关.接上后直接调整到适合亮度秒可以了.

继续加电阻啊！不同意7楼兄弟说法，那样很容易出问题的！！！要慎重！！！

继续加电阻啊！不同意7楼兄弟说法，那样很容易出问题的！！！要慎重！！！
——本文来自〖www.521LED.com〗原帖地址：http://www.521led.com/viewthread.php?tid=1494&fromuid=2037

继续加电阻啊！不同意7楼兄弟说法，那样很容易出问题的！！！要慎重！！！
——本文来自〖www.521LED.com〗原帖地址：http://www.521led.com/viewthread.php?tid=1494&fromuid=2037
twlyqy 发表于 2009-6-1 19:26

不同意楼上的说法。加大电阻的话，对led的安全性高点。
50个蓝色led，正常接4k电阻就行了。
但如果嫌灯亮，刺眼，可以将电阻加大到10-18k左右，减小电流！

很有同感哦，都没有其它办法了吗？

就是加电阻呵呵[img][/img]

[whitepad]***400;200;400,200;;** m31,69 l35,69,40,67,46,63,53,60,58,56,62,52,63,52,63,56,59,62,56,68,53,71,51,74,49,75,50,75,59,72,65,72 e|********* m47,70 l44,73,41,81,35,94,26,108,18,117,14,125,11,130,10,131 e|********* m32,107 l33,107,36,114,37,116,38,120,39,121 e|********* m42,104 l43,103,46,101,52,99,57,96,66,91,71,90,75,87,78,87,79,89,79,92,77,96,75,98,71,101,69,102,66,102,60,98,55,94,55,91,53,88,53,86 54,89,54,101,51,113,49,118,49,121 e|********* m82,81 l84,81,84,82,85,87,85,94,83,96,83,98,84,96,86,91,95,71 e|********* m106,47 l106,54,104,57,102,62,102,65,100,70,100,75,98,80,98,85,96,90,96,149,94,149,92,146,89,139,85,132,80,124,79,117,77,116 e|********* m131,57 l131,58,136,58,143,53,146,50,155,44,163,37,165,36,169,32,169,35,167,40,166,45,154,63,152,67,149,69,147,70,147,71,148,71,153,68,166,62,167,60 167,59,148,59,139,56,131,53,131,52,132,55,132,66,130,76,127,88,123,99,120,112,115,121,113,126,113,130 e|********* m134,88 l135,88,138,86,152,82,151,82,139,90,136,93,133,95,132,96,132,98,138,98,145,96,150,93,154,91,155,91,156,89,154,90,149,95,146,99,140,105,132,117 129,123,126,125,124,126,124,127,125,127,127,125,135,119,138,117,146,110,149,108,154,108,154,109,155,110,155,115,153,116,150,119,144,121,143,123,142,123 e|********* m198,53 l198,54,199,57,197,61,195,66 e|********* m190,74 l190,78,191,79,191,82,192,86,192,101,190,106,190,108,191,106,197,99,201,93,204,89 e|********* m211,48 l212,48,218,46,226,43,235,38,241,37,243,34,236,34,233,32,229,30,229,28,227,26,227,25,228,30,228,56,226,64,226,71,224,71,222,65,219,60,219,49 220,49,220,50,218,53,213,59,209,64,205,71,202,74,201,76,201,74,202,73 e|********* m225,50 l227,50,234,57,241,61,245,65,254,66,257,67,255,67,248,63 e|********* m222,71 l222,72,216,76,206,81,197,85,190,87,184,91,186,91 e|********* m227,64 l228,64,228,66,230,68,254,79,261,81,265,83,260,83 e|********* m235,81 l235,84,236,86,236,114,237,117,237,118,231,112,225,103,220,96,219,94,217,93,212,98,211,101,209,103,208,107,208,108,206,109,206,110,208,110,208,108,210,106 e|********* m244,91 l244,92,245,92,247,94,255,98,270,105,279,107,280,109,278,109,258,104,245,101,238,98,236,97,233,95,232,95 e|********* m292,44 l293,45,293,47,291,48,288,52,282,55,279,57,280,58,283,59,289,60,292,61,294,61,294,62,292,63,289,64,283,70,275,74,273,74,274,75,276,75,280,76 281,78,281,89,279,92,280,92,287,88,291,83 e|********* m304,51 l312,49,319,47,321,47,322,45,320,45,317,46 e|********* m293,69 l301,67,305,64,306,64,308,62,311,60,313,58,318,56,322,54,323,52,321,52,316,54,311,58,309,59,309,61,310,63,310,67,313,93,314,101,315,108,315,113 316,116,313,113,309,110,303,106,301,104,292,98,288,96,286,94,286,92 e|********* m326,65 l327,65,327,66,328,66,328,70,329,71,329,74,330,77,330,79,331,77,333,71,334,69,338,64,343,59,345,59,345,60,343,62,339,69,337,71,335,72,337,72 340,70,349,67,354,63,354,60,352,60,352,58,348,56 e|********* m348,41 l348,39,349,38,352,36,356,34,361,33,368,33,368,35,366,38,362,46,356,49,353,50,356,50,356,66,358,74,359,77,361,80,364,83,367,84,369,87,370,88 371,88,371,91,368,93,363,96,356,99,351,100,336,100,333,98,332,97,330,96,332,94,341,94,353,90,365,85,363,85,363,81,361,80,360,80,359,78 e|********* m375,55 l375,52,377,50,379,47,383,44,386,43,395,43,395,52,393,59,390,66,390,71,388,73,388,76,385,77,382,80 e|********* m387,106 l388,106,389,104,390,103,388,104,385,104,385,101,386,94,387,94,388,99,388,100 e[/whitepad]

电流高了自然就亮啊！！！！！！！！！