Cheap Lightmeter Test - LD40 and E21 as Referance

[eprom]

UPDATE:
10/29/2010 - After seeing my lux-meter has a good accuracy when Fenix measurements used as reference. Now I am measuring other Fenix Lights wich has not Fenix measured lux values.

Hi Friends,

I was thinking, how accurate was my lux readings with DX Lightmeter sku.7954 so loaded the Fenix Lights which have ANSI FL1 values and make my measurments as usual from 7.26 meter.

Results are,

LD40 = 199,2lux @7.26m = 10500 lux @1m = Fenix claimed 10733cd
E21 = 84,8lux @7,26m = 4469 lux @1m = Fenix claimed 4510cd
LD25 = 61,2lux @7,26m = 3243 lux @1m = Fenix claimed 3545cd

LD15 = 13,8lux @7,26m = 731 lux @1m = Fenix claimed N/A
TK12-R5 = 133,2lux @7,26m = 7059 lux @1m = Fenix claimed N/A
TK11-R5 = 134,6lux @7,26m = 7133 lux @1m = Fenix claimed N/A
TK45 = 200,6lux @7,26m = 10631 lux @1m = Fenix claimed N/A
TK30 = 334,3lux @7,26m = 17717 lux @1m = Fenix claimed N/A

these are very close what Fenix Claimed.

Note: As calculated here 1lux=1cd when metric system (SI) used for all measurments.

 

[jonnyfgroove]

Thanks for the testing, I have an LD40 on the way and now I'm even more excited. lovecpf

 

[Bullzeyebill]

Always nice to see a CPF'er using some of the available tools out there for research on their lights. I've been using a lightmeter for years, for bounce, and for lux measurements for comparative purposes with my own lights.

Bill

 

[eprom]

LD25 measurement added to original post as a reference.

 

[TITANER]

Guy,thanks for your helpful info ,good job:wave:.

 

[eprom]

LD15, TK11-R5, TK12-R5 measurements added to original post as a reference.

 

[eprom]

LD45, TK30 measurements added to original post.

 

[Harry999]

eprom,

Thank you for providing this information. I have a LD25 which I keep as an emergency back up light. It is nice to know I can trust Fenix on the specs they provide. :thumbsup: