Anche io ho acquistato una U21 N.W. ma purtroppo è stata una delusione.
Sconsiglio tutti dal comprare il led N.W.
Queste le mail con Manker (praticamente una fregatura)
From: Fabrizio
Date: 2017-04-14 05:21
To: info
Subject: Led features U21
This is very disappointing and means that my purchase is not quality, and I was wrong to choose the LED neutral white.
Unfortunately I will have to try to sell this lamp because for me useless and still advise against buying this type of LED
because the features are not those tabled at the time of sale.
Thanks again
Fabrizio
N.B.
The test method was performed at night, in turbo mode, trying to illuminate the crown of a tree about 300 meters and was poor.
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Il 14/04/2017 04:13,
info@mankerlight.com ha scritto:
Hello Fabrizio,
1. XHP35 color temperature define from Cree.com:
CW: 5300K-8300K
NW: 4000K-5000K
WW: 2700-3500K
So 3500/4000K is almost NW version but yes looks yellow.
There might be some difference between different batch of product.
We will try to order same version emitters from Cree in the near future to solve the issue you have.
2. The pink reflections is caused by coat on the coated lens.
3. Max beam distance 700 meters on Turbo mode.(Max beam intensity tested by lux meter and then calculated the distance.)
Reviewers also got almost even better throw result.
Please let know your test method.
Yours sincerely,
Jason
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From: Fabrizio
Date: 2017-04-14 05:21
To: info
Subject: Led features U21
Dear Sirs,
i purchased your lamp U21 (bundled) with LED color neutral white , but
the result is really unsatisfactory.
The LED seems a 3500/4000 K (to distance the color tends to yellow),
from the lens appear pink reflections as if there is an intermediate
filter and also the light has difficulty to reaching 300 meters.
I wish some clarification because from the various reviews these
deficiencies are not showed.
I do not want these defects depend on the type of LED chosen by me
because these problems have not been highlighted in the tab of the lamp
characteristics (neutral white instead of cold white).
With best regards
Fabrizio