c******n
发帖数: 4965 | 1 【 以下文字转载自 BayHandy 俱乐部 】
发信人: creation (努力自由泳50m/45sec !), 信区: BayHandy
标 题: electronics | LED light
发信站: BBS 未名空间站 (Mon May 6 03:01:17 2013, 美东)
I got all the equipment for my LED DIY.
here I put it together:
a 50W LED assembly, a big (16inch x 6 inch x 1 inch ) heat sink.
the 50W power supply to give 30v output (LED is 5 parallel lines of 10 LED
each)
it is quite bright, but I think roughly the same as a 100W equivalent CFL.
the main issue is heat, even with such a big heat sink, the temperature goes
so high that I can barely touch it with my hands. I estimate it to be at
least 70degrees celcius.
I tried to lookup cheap heat sink options on ebay, but not many.
particularly I want to fit the heat sink in a ceiling light, so should be
less than 200mmx200mmx 50mm
any ideas on how much heat a passive aluminum heatsink can dissipate? | B*G
发帖数: 13438 | 2 50W的白光LED就算温度没问题也就相当于100多不超过200瓦的CFL吧，你室内真的需要
这么亮么？我觉得26瓦的CFL已经相当亮了。Heat sink的热阻很容易查到，去digikey
一类的网站找个相同尺寸相同材质的就行了。然后找个Kill a watt测一下LED功率。直
接建议是要么上风扇，要么用多个小LED。
goes
【在 c******n 的大作中提到】
: 【 以下文字转载自 BayHandy 俱乐部 】
: 发信人: creation (努力自由泳50m/45sec !), 信区: BayHandy
: 标 题: electronics | LED light
: 发信站: BBS 未名空间站 (Mon May 6 03:01:17 2013, 美东)
: I got all the equipment for my LED DIY.
: here I put it together:
: a 50W LED assembly, a big (16inch x 6 inch x 1 inch ) heat sink.
: the 50W power supply to give 30v output (LED is 5 parallel lines of 10 LED
: each)
: it is quite bright, but I think roughly the same as a 100W equivalent CFL.
| c******n
发帖数: 4965 | 3 thanks, this is warm-white, I guess the light efficiency is lower
digikey
【在 B*G 的大作中提到】
: 50W的白光LED就算温度没问题也就相当于100多不超过200瓦的CFL吧，你室内真的需要
: 这么亮么？我觉得26瓦的CFL已经相当亮了。Heat sink的热阻很容易查到，去digikey
: 一类的网站找个相同尺寸相同材质的就行了。然后找个Kill a watt测一下LED功率。直
: 接建议是要么上风扇，要么用多个小LED。
:
: goes
| g******u
发帖数: 3060 | 4 try digikey or mcmaster, more heatsink options. |
|
