1. Senior Member
Join Date
Sep 2004
Posts
3,095

## Lumens

Does anyone know the differance from Lumens Candlepower Foot Candles and MCD s. I am trying to figure out how to accurately figure out which flashlight is better brighter than its competetors. Quite confusing for me at least. Thanx

2. Senior Member
Join Date
Jan 2004
Location
Taftville CT
Posts
741
I have a hand book of reference tables that has some lumens formulas in it. No lighting engineer. I do not know exactly what you are looking for, how many of this = that, or this in comparison to that. I do not know what an "MCD" is either, except for the "golden arches".

3. Senior Member
Join Date
Mar 2001
Location
Nottingham, England
Posts
16,133
1 foot candle = 10.76391 meter-candles

4. Senior Member
Join Date
Jan 2003
Posts
235
Take the flashlights and shine them into your eye, the one that blinds you the best is the one to buy. Smitty

5. Join Date
Mar 2005
Posts
36
Smitty...

Is that what they call a "blind comparison"?

6. Senior Member
Join Date
Jun 2002
Posts
600
Try searchin on the interney "Lumans to Candles", etc. There are plenty of those conversion engines available.

Marv

7. Senior Member
Join Date
Aug 2003
Location
Nazareth, PA
Posts
2,399

what you ask cannot be done. on several of the message boards and newsgroups i've been on over the years this topic comes up quite frequently. the last million-reply thread on it was on the rec.guns newsgroup when guys were trying to decide which tactical flashlight to purchase.

the problem is that a candlepower is a unit of measurement describing the light output from a point source based on an archaic standard of "one candle power". a lumen is the measurement of a light's intensity over a given area. a flashlight of 1000 candlepower will have a different lumen value depending upon how far away from the light source the measurement is taken. think of it this way, if you are 1" from a light, it is very bright, if you are 10' from it, the light cast on to a surface (the lumen value) is much less, but the candlepower of the source has not changed.

andy b.

8. Senior Member
Join Date
Mar 2003
Location
South Central Tennessee
Posts
275
According to my "Pocket Reference":

To convert from candle power to lumens you multiply by 12.566

I know this is what we use at work when we calibrate light meters.

Hal C. , www.tempyramid.com

9. Senior Member
Join Date
Sep 2004
Posts
3,095
Hey Smitty Ill just take youre advice but Ill shine the light in someone elses eyes. II ll probably use one of the kids.

10. JPR
Senior Member
Join Date
Jun 2004
Posts
560
here is the free conversion program that I use http://www.joshmadison.com/software/convert/

#### Posting Permissions

• You may not post new threads
• You may not post replies
• You may not post attachments
• You may not edit your posts
•