mcd to Lumens ?
#1
Junior Member
Thread Starter
Join Date: Jun 2011
Posts: 17
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
mcd to Lumens ?
Hi guys,
I'm looking at front bike lights and some I have seen say the following: -
"Ultra bright 12,000 mcd LED's"
The question is how does this relate lumens?
Thanks
Bryan
I'm looking at front bike lights and some I have seen say the following: -
"Ultra bright 12,000 mcd LED's"
The question is how does this relate lumens?
Thanks
Bryan
#2
Señior Member
Join Date: Sep 2005
Location: Michigan
Posts: 13,749
Bikes: Windsor Fens, Giant Seek 0 (2014, Alfine 8 + discs)
Mentioned: 13 Post(s)
Tagged: 0 Thread(s)
Quoted: 446 Post(s)
Likes: 0
Liked 8 Times
in
7 Posts
There's no direct relationship, they don't really measure the same thing (well, they're both related to brightness but they're measured in different enough ways that it's almost impossible to directly convert).
My basic rule is that, these days, if they list the brightness in candlepower, it means it's not very bright. All the actually bright systems use lumens.
My basic rule is that, these days, if they list the brightness in candlepower, it means it's not very bright. All the actually bright systems use lumens.
__________________
Work: the 8 hours that separates bike rides.
Work: the 8 hours that separates bike rides.
#3
Senior Member
Join Date: Mar 2004
Location: La Verne CA
Posts: 5,049
Bikes: Litespeed Liege, Motorola Team Issue Eddy Mercxk, Santana Noventa Tandem, Fisher Supercaliber Mtn. Bike
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 14 Post(s)
Likes: 0
Liked 11 Times
in
7 Posts
This is a 12,000 mcd light, probably putting out in the 20-30 lumen range. Not even enough to be seen. When vendors use mcd's to impress you, the light probably sucks..
https://www.ledwholesalers.com/store/...&productId=110
#4
Junior Member
Thread Starter
Join Date: Jun 2011
Posts: 17
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
Thanks guys, appreciate the replies
As you say it does sound impressive and to those not in the know (like me) VERY impressive.........they'll go on the back burner and we'll look for lights that talk lumens.
Thanks again
Bryan
As you say it does sound impressive and to those not in the know (like me) VERY impressive.........they'll go on the back burner and we'll look for lights that talk lumens.
Thanks again
Bryan
#6
Senior Member
Join Date: Jul 2008
Location: Austin, TX
Posts: 3,040
Bikes: Bacchetta Giro, Strada
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 6 Post(s)
Likes: 0
Liked 1 Time
in
1 Post
No, you are basically correct.
Note that a candle isn't very bright, and "candela" and "lumens" measure different things.
As others have said, stick to lights that give lumens. If they only give candlepower or candela, the light is probably not very good.
Note that a candle isn't very bright, and "candela" and "lumens" measure different things.
As others have said, stick to lights that give lumens. If they only give candlepower or candela, the light is probably not very good.
Thread
Thread Starter
Forum
Replies
Last Post
cthenn
Electronics, Lighting, & Gadgets
26
11-06-15 08:39 AM