Yawn!!!
eBay sellers and some Chinese manufacturers are famous for exaggerating.
The seller is claiming Chinese sellers are exaggerating. He is exaggerating even more
A custom LED would cost the seller hundreds of dollars per LED. At the price he is charging for the whole flashlight it is not REAL proprietary. The seller is just saying that so you cannot figure out how much light that flashlight actually produces. Let us try to figure it out anyway.
The best high power production Cree LED at the moment is the MC-E rated by Cree at 700+ Lumens at 2.8A.
That flashlight uses only 1*18650 battery. Most 1*18650 battery flashlights can only manage 2A to the LED so you are down to 700*2/2.8=500 LED lumens.
Now the reflector and lens absorb some of the light. Light transmission range from 65% for Maglite to 81% for Fenix. Let us use 75% somewhere between the extremes. 500*0.75=375 OTF lumens.
Earlier today I was browsing through
Actual Lumens readings in 6" dia. Lab Sphere IS with SC 5500 control - PART II
http://www.candlepowerforums.com/vb/showthread.php?t=229135
DX_MC-E High_____________385__turn-on,__________1_18650 LI
DX_MC-E High_____________345__warm____________1_18650 LI_
My calculation was not that far off.
(the same manufacturers make most of the lights for both ebay sellers and DX)
So is it that bad?
A 3D incan Maglite is 32 lumens.
A 4D incan Maglite is 52 lumens.
The new REBEL MagLED is 100 lumens.
350-400 lumens is still way brighter than stock Mags which many people consider premium lights.
Take a quick browse through my link above and this other sticky:
Actual Lumen Readings in 10.5in Sphere.
http://www.candlepowerforums.com/vb/showthread.php?t=260659
Pay particular attention to the LED/battery combination.
They will give you a better feel for what to expect.
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I did a google search for T.I.T.E. BLINDER and all links point back to your seller. Looks like T.I.T.E. BLINDER is his proprietary name for the flashlight.