Runtimes, LD01 vs. L0D

Chao · Nov 18, 2008

Just done this, they all tested with fresh alkaline batteries. Look like the new designed LD01 is efficient than L0D.

I set the outputs in graph all beginning at 100%, actually, the LD01 is a little brighter than L0D Q4.
Lux readings: LD01: 775 lux, L0DQ4: 595 lux.

liquidsix · Nov 18, 2008

Wow good stuff. Taking into account your lux readings, if the reflector hasn't changed thats about 25% increase in output, as well as about 30-40% increase in runtime. 25% x 30-40% = huge area under the graph!

I'm sure my math's all wrong, and someone will correct me but that's still really good. My last L0 was a Q2 bin so I think the Ld01 will be a big jump.

Curious_character · Nov 18, 2008

You can't determine the relative efficiency by looking at the lux numbers, unless you're getting them from an integrating sphere or light box. All that's necessary to increase the lux reading is to sharpen the focus. Efficiency is determined by the ratio of total light output -- not the intensity of the main beam -- to power in.

c_c

RobertM · Nov 18, 2008

As always, thanks for the runtime comparison graph! :twothumbs

mechBgon · Nov 18, 2008

Thanks, and if you do a test with NiMH, that would also be interesting to see!

PeterB · Nov 18, 2008

Thanks for the test!
Is the lux reading at 1m distance?

Chao · Nov 18, 2008

PeterB said:
Thanks for the test!
Is the lux reading at 1m distance?

Yes, the lux readings were measured at 1m distance

, and I will also do the NiMH runtimes for both lights.

EngrPaul · Nov 18, 2008

Thanks for the runtime, always appreciated!

The new reflector is awesome. Maybe the improved runtime comes from the built-in Sun.

StandardBattery · Nov 18, 2008

Thank you, that's very useful. :thumbsup:

baterija · Nov 18, 2008

mechBgon said:
Thanks, and if you do a test with NiMH, that would also be interesting to see!

+1 it would take some of the battery variation out using the same Nimh for each. Nice contribution though.

HighLumens · Nov 20, 2008

hi all

if you look at the l0d and ld01 at fenix-store.com you notice this:

L0D= 11lumens for 8.5h;30lumens for 3.5h; 75lumens for 1h.

LD01= 10lumens for 8.5h; 27lumens for 3.5h; 80lumens for 1h.

So the LD01 is 1 lumen less (on low) and 3 lumens less (on medium) than the L0D with the same runtime. Isn't it a bad thing? Shouldn't the runtime increase because of the less lumens?

From your graph I also notice that the LD01 is brighter with a longer runtime than the L0D, so why fenix-store wrote that runtimes and levels of output?

p.s.: sorry if I wrote something stupid, I'm a new member

kramer5150 · Nov 20, 2008

EngrPaul said:
Thanks for the runtime, always appreciated!

The new reflector is awesome. Maybe the improved runtime comes from the built-in Sun.

Is it just me or is the Q5 missing the metal "ring" around the dome?

Marduke · Nov 20, 2008

HighLumens said:
hi all

if you look at the l0d and ld01 at fenix-store.com you notice this:

L0D= 11lumens for 8.5h;30lumens for 3.5h; 75lumens for 1h.

LD01= 10lumens for 8.5h; 27lumens for 3.5h; 80lumens for 1h.

So the LD01 is 1 lumen less (on low) and 3 lumens less (on medium) than the L0D with the same runtime. Isn't it a bad thing? Shouldn't the runtime increase because of the less lumens?

From your graph I also notice that the LD01 is brighter with a longer runtime than the L0D, so why fenix-store wrote that runtimes and levels of output?

p.s.: sorry if I wrote something stupid, I'm a new member

I remember a statement about Fenix making their measurements more accurate as they slowly transition more of their models from emitter to OTF lumens.

HighLumens · Nov 21, 2008

ehm... "OTF" ?? Sorry, what is it? is there a topic where I can learn all the particular words I will read in this forum?

parnass · Nov 21, 2008

HighLumens said:
ehm... "OTF" ?? Sorry, what is it? ..

OTF means "out the front." The amount of light is being measured after it passes through any optic, lens, window, etc. vs. being measured directly from the LED and before the loss incurred by the other parts.

HighLumens · Nov 22, 2008

ah ok, thanks

Mark A. · Nov 24, 2008

"ehm... "OTF" ?? Sorry, what is it? is there a topic where I can learn all the particular words I will read in this forum?"

Try Carrot's Guide: http://cpf.carrot.googlepages.com/flashlight_guide
as well as the CPF Welcome Mat: https://www.candlepowerforums.com/threads/172991

Regards,

Mark A.

HighLumens · Nov 25, 2008

Great, Thanks so much

Ice · Jan 23, 2009

That's why I really like this forum! :naughty: Thanks a lot for those graphs! :bow:

Bullzeyebill · Jun 17, 2009

Chao, I brought this thread back to life because I have not seen runtimes of the LD01 Q5 with AAA NiMh on high, med, and low. Have searched, and also gone through the sticky Runtime Thread in Reviews, to no avail. Would you please post this info. Thanks,

Bill

Never mind. I found runtimes here, http://www.light-reviews.com/fenix_ld01_ss/ thanks anyway.

Bill

Runtimes, LD01 vs. L0D

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