Ken_McE
Flashlight Enthusiast
- Joined
- Jun 16, 2003
- Messages
- 1,687
I'm prowling eBay looking to pick up a good sized batch of 5mm white LEDs. The advertised brightness varies wildly from seller to seller, all the way from 5,000 mcd to 35,000 mcd, to ones that are advertised as "8 lumens".
On paper this one sounds good: http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=7569370589&rd=1&sspagename=STRK:MEWA:IT&rd=1 they say that it has two dies and will produce 35,000 mcd. There are others that claim outputs in the 20,000+ mcd range. Anyone have any opinions on what to look for, avoid? I know dealers can get, ahm, "creative" with their product claims... 8-(
I'm after 5mm as being a good point to get highest output (lumens per watt) in smallest size, without needing to bring in heat sinks. I'm going to have a long line of them and don't really care about color temperature, beam size or artifacts.
I do care about reliability and don't want to burn them out in a month because some vendor says "Yeh, you run it at 250 mA, it's real bright!, yeh man you're supposed to" :huh:
On paper this one sounds good: http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=7569370589&rd=1&sspagename=STRK:MEWA:IT&rd=1 they say that it has two dies and will produce 35,000 mcd. There are others that claim outputs in the 20,000+ mcd range. Anyone have any opinions on what to look for, avoid? I know dealers can get, ahm, "creative" with their product claims... 8-(
I'm after 5mm as being a good point to get highest output (lumens per watt) in smallest size, without needing to bring in heat sinks. I'm going to have a long line of them and don't really care about color temperature, beam size or artifacts.
I do care about reliability and don't want to burn them out in a month because some vendor says "Yeh, you run it at 250 mA, it's real bright!, yeh man you're supposed to" :huh:
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