Posts Topics Forums Images
Search videos from message boards Videos Search messages from microblogs Microblogs Search messages from imdb.com Imdb Search messages from yuku.com Yuku Search messages from lefora.com (free forums) Lefora
My account: Login | Sign Up
Loading... 

Thread: Flashlight brightness technology

Started 1 month, 1 week ago by JimL
Does anybody have a handle on candela versus lumens? "Out there" I see the brightest defense flashlights rated at 150 or 200 lumens. Today I saw a defense flashlight rated at 12,000MCD that hurt my eyes. According to converting calculators I have found, 150 lumens converts to about 6.3 million MCD - well over 500 times as bright as the above flashlight. Working the ...
Site: The Firing Line  The Firing Line - site profile
Forum: Gear and Accessories  Gear and Accessories - forum profile
Total authors: 5 authors
Total thread posts: 14 posts
Thread activity: no new posts during last week
Domain info for: thefiringline.com

Other posts in this thread:

madmag replied 1 month, 1 week ago
Well, this is one of those things that there is no easy conversion factor. The candlepower is almost not used anymore, and it did refer to actual candles. I will give you a rough comparison. My Streamlight Ultra Stinger is rated both ways by Streamlight. It is rated at 75000 candlepower and at 295 lumen's. Now here is the problem. You cannot use this as a direct conversion because lumen's is ...

JimL replied 1 month, 1 week ago
Quote: From my example I would say the 12000 MCD is the brightest by far. I read 12000 MCD as 12000 X 10 to the 6 candle power.....and that's a big number. Hm. Something I read said MCD means millicandela and/or megacandela. I guess some disciplines use milli to mean divided by 1000 while others use it to mean multiplied by 1000. Confusing....

madmag replied 1 month, 1 week ago
Quote: And it would be odd if the 12000 MCD was the brightest of the two. It sells for $25, OK, I am probably wrong on the units. I read that the capital M was meg and the little m was milli, anyway you are not going to beat 150 lumen's for $25. Quote: I bought the 12000 MCD light today at a gun show. I tried...

johnson_n replied 1 month, 1 week ago
Candlepower is the measurement of how bright it is at one spot (think spotlight or laser pointer). Lumens is total light output. If you've ever used SureFire or any lights like that, a 60 lumen two cell vs a 500 lumen 6 cell (SureFire M6 for example) both have the same brightness but the M6 puts out much more light. There's really no way to compare CP to Lumens. And even then, ...

madmag replied 1 month, 1 week ago
Quote: If you've ever used SureFire or any lights like that, a 60 lumen two cell vs a 500 lumen 6 cell (SureFire M6 for example) both have the same brightness but the M6 puts out much more light. Can't agree on that. I have the SureFire G2 (6v) that originally had the 60 lumen incandescent lamp. That is not the same lamp that the M6 (18V) uses....

ZeSpectre replied 1 month, 1 week ago
Quote: Candlepower is the measurement of how bright it is at one spot (think spotlight or laser pointer). Lumens is total light output. I like to use the "hose" analogy. A hose emits water, a flashlight emits photons. If you have a hose it has a maximum capacity of water (Gallons per minute) that it can emit. HOW it emits that water is ...

JimL replied 1 month, 1 week ago
Quote: There's really no way to compare CP to Lumens. And even then, different companies use different ways of measuring their output. Different ways indeed. I doubt half of them know what their claims mean. Another thing. I'm attempting to compare two lights, one rated in MCD and one rated in lumens. Bad enough in the first place. Now...

JimL replied 1 month, 1 week ago
Quote: I go back to my Streamlight. 75000 candle power is about 295 lumen's. So that's about .004 lumen's per 1 candle power. The fact is that 150 lumen's is pretty good. The old standard for years was a 3 "D" Maglight at about 45 lumen's, I realize as someone said again, that candela and lumens are apples and oranges - my OP even made the ...

JimL replied 1 month, 1 week ago
Quote: Candlepower is the measurement of how bright it is at one spot (think spotlight or laser pointer). Lumens is total light output. As you can see, I said pretty much that in my OP. But such technicalities simply aren't helpful when the manufacturers use multiple non-standard descriptions. I think that Madmag's .004 rule, while not ...

geologist replied 1 month, 1 week ago
I agree that the new LEDs have come a long way in terms of output, throw and battery life. I went from a Surefire 6P to a cheapy NOMA 140 lumen light that runs on 3 AAAs. TBS the flashlight under the seat of each of my trucks is an old school 3 D cell Maglight. It's hard to change a BGs attitude with a small, plastic tactical light

 

Top contributing authors

Name
Posts
JimL
7
user's latest post:
Flashlight brightness technology
Published (2009-11-11 13:24:00)
I looked up my $25 12,000 MCD flashlight (A Nebo) on the internet. Oddly the first thing I found was a smaller, cheaper one (still Nebo), a $16 96,000 MCD flashlight, according to the description. HUH?! I'm even more convinced that the makers don't know what they are talking about.
madmag
4
user's latest post:
Flashlight brightness technology
Published (2009-11-11 21:19:00)
JimL, I think $25 range will get you a decent LED flashlight, but I think if you stick with buying at Target, Sears, Wal-Mart, etc you will find their lights are listed in lumens and are usually accurate about brightness.
ZeSpectre
1
user's latest post:
Flashlight brightness technology
Published (2009-11-09 15:50:00)
Quote: Candlepower is the measurement of how bright it is at one spot (think spotlight or laser pointer). Lumens is total light output. I like to use the "hose" analogy. A hose emits water, a flashlight emits photons. If you have a hose it has a maximum capacity of water (Gallons per minute) that it can emit. HOW it emits that water is greatly dependent on the shape and size of the nozzle. A very large nozzle with a lot of...
johnson_n
1
user's latest post:
Flashlight brightness technology
Published (2009-11-08 23:29:00)
Candlepower is the measurement of how bright it is at one spot (think spotlight or laser pointer). Lumens is total light output. If you've ever used SureFire or any lights like that, a 60 lumen two cell vs a 500 lumen 6 cell (SureFire M6 for example) both have the same brightness but the M6 puts out much more light. There's really no way to compare CP to Lumens. And even then, different companies use different ways of measuring their...
geologist
1
user's latest post:
Flashlight brightness technology
Published (2009-11-09 16:33:00)
I agree that the new LEDs have come a long way in terms of output, throw and battery life. I went from a Surefire 6P to a cheapy NOMA 140 lumen light that runs on 3 AAAs. TBS the flashlight under the seat of each of my trucks is an old school 3 D cell Maglight. It's hard to change a BGs attitude with a small, plastic tactical light

Related threads on other sites:

Thread profile page for "Flashlight brightness technology" on http://www.thefiringline.com. This report page is a snippet summary view from a single thread "Flashlight brightness technology", located on the Message Board at http://www.thefiringline.com. This thread profile page shows the thread statistics for: Total Authors, Total Thread Posts, and Thread Activity