Samsung LH351D 5000k LED output test by Texas_Ace - Amazing output, low thermal resistance but high Vf

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moderator007
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Contactcr tested a few LH351D’s from Digikey here. http://budgetlightforum.com/node/68582
Shaving the dome lowers the cct and gets them even closer to the bbl.

garrybunk
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Does the Samsung LH351D fit optics made for XP-G2’s (in my case it’s a quad optic bike light) without any modding?

Thanks!
-Garry

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Texas_Ace
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garrybunk wrote:
Does the Samsung LH351D fit optics made for XP-G2’s (in my case it’s a quad optic bike light) without any modding?

Thanks!
-Garry

In most cases yes but the dome is larger on the 351D IIRC so it can have issues with some optics.

It will be MUCH floodier then an XP-G2 as well in the same optic.

Basically it is a case of try it and see how you like it.

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Worse case, you could probably shave the dome off the LH351D. This will not only aid fitment if there is interference with the optic, but it will drop about 500K in CCT (5000K becomes 4500K), lowers DUV, and makes it less floody. You’d loose a few lumens though.

garrybunk
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Thanks for the responses! I like the idea of plenty of flood, but I still need some throw.

-Garry

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Caleb
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From this test…“The dome started to burn around 5A…”

Has anyone tried this the LH351D with Convoy’s 6A driver?

id30209
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Caleb wrote:
From this test..."The dome started to burn around 5A..." Has anyone tried this the LH351D with Convoy's 6A driver?

 

I am running it in S21A for few months now without issues

WTB Titanium 4sevens 2xAA tube

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id30209 wrote:

Caleb wrote:
From this test…“The dome started to burn around 5A…” Has anyone tried this the LH351D with Convoy’s 6A driver?

 


I am running it in S21A for few months now without issues

Good to know!

Cheers!

Techno
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I’ve two pieces of Convoy S2+ on the 12-mode 5A driver and Samsung LH351D 4000k LED. Both LEDs seem to have developed burn/black spots on the dome.

the lights themselves work fine and the black spots don’t affect the beam pattern. But this is the first time I’ve seen this happen.

X

lfb
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Techno wrote:
I’ve two pieces of Convoy S2+ on the 12-mode 5A driver and Samsung LH351D 4000k LED. Both LEDs seem to have developed burn/black spots on the dome.

the lights themselves work fine and the black spots don’t affect the beam pattern. But this is the first time I’ve seen this happen.

That didn’t happened to my s2+ 5000k, but my batteries only provide 3.5A.
Are you sure that isn’t any dust?

Techno
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lfb wrote:
Techno wrote:
I’ve two pieces of Convoy S2+ on the 12-mode 5A driver and Samsung LH351D 4000k LED. Both LEDs seem to have developed burn/black spots on the dome.

the lights themselves work fine and the black spots don’t affect the beam pattern. But this is the first time I’ve seen this happen.

That didn’t happened to my s2+ 5000k, but my batteries only provide 3.5A.
Are you sure that isn’t any dust?

It’s not dust. I’ve tried to clean it off with lighter fluid and cotton swab, but it’s still there.

X

lfb
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Techno wrote:
lfb wrote:
Techno wrote:
I’ve two pieces of Convoy S2+ on the 12-mode 5A driver and Samsung LH351D 4000k LED. Both LEDs seem to have developed burn/black spots on the dome.

the lights themselves work fine and the black spots don’t affect the beam pattern. But this is the first time I’ve seen this happen.

That didn’t happened to my s2+ 5000k, but my batteries only provide 3.5A.
Are you sure that isn’t any dust?

It’s not dust. I’ve tried to clean it off with lighter fluid and cotton swab, but it’s still there.


That’s weird. It shouldn’t happen with less than 5A. Anyway you can slice the dome like I did Blushing
Techno
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lfb wrote:

That’s weird. It shouldn’t happen with less than 5A. Anyway you can slice the dome like I did Blushing

The S2+ with LH351D is 5A.

X

lfb
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Techno wrote:
lfb wrote:

That’s weird. It shouldn’t happen with less than 5A. Anyway you can slice the dome like I did Blushing

The S2+ with LH351D is 5A.


Yes, but it’s almost impossible to get 5A due to high vf of lh351d.

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