The dreaded question! How many real lumens?

[Gliderguy]

For a S/S LD01 on max with E2 lithium? After comparing it to an unmodified Peak Carribean, Neo Amilite T3 with upgraded emitter and a P2D rebel 100 on various levels, I estimate about 45 +/- 5 real lumens. This is after going to the lightbox measurments on flashlightreviews.com and looking at the recent integrating sphere test thread.

To think that maybe 4 years ago this was cutting edge territory for a single cell CR123 is pretty amazing to me.

Discussion?

 

[KeyGrip]

What is the stated output?

 

[Marduke]

Real measurements (depending on who you believe) put it at about 70+ OTF lumens on high.

 

[Gliderguy]

80 claimed maximum lumens. Seems like fenix is only about 15% or so optimistic if the rebel 100 and q5 P2D's get 140-150 measured lumens from a claimed 175 or 180.
maybe 55-60 lumens OTF. I think chevrofreak estimated low 60s on L0D, which is almost the same light.

 

[Marduke]

80 claimed maximum lumens. Seems like fenix is only about 15% or so optimistic if the rebel 100 and q5 P2D's get 140-150 measured lumens from a claimed 175 or 180.
maybe 55-60 lumens OTF. I think chevrofreak estimated low 60s on L0D, which is almost the same light.

Fenix uses a mix of emitter and OTF specs as they appear to be in transition between them.

 

[LEDninja]

Flashlight reviews got 33.8(*1.39)=~47 lumens OTF off a 1st gen L0D CE
http://flashlightreviews.com/reviews/fenix_l0dce.htm

Fenix specs
1st gen L0D CE - 50 lumens
L0D Q4 - 75 lumens
LD01 - 80 lumens

So my OTF estimate
L0D Q4 75*47/50=~70 lumens
LD01 80*47/50=~75 lumens

Note that with production variations in LED, LED vf, circuit boards etc you will get +-10% of any stated value.

So my revised OTF estimate
L0D Q4 63 to 70 lumens
LD01 67.5 to 82.5 lumens

I would use the lower number and be 'pleasantly surprised' if I get more.